diff --git a/targets/TARGET_RDA/TARGET_UNO_91H/lib/LICENSE-permissive-binary-license-1.0.txt b/targets/TARGET_RDA/TARGET_UNO_91H/lib/LICENSE-permissive-binary-license-1.0.txt
deleted file mode 100644
index 2d906989d58..00000000000
--- a/targets/TARGET_RDA/TARGET_UNO_91H/lib/LICENSE-permissive-binary-license-1.0.txt
+++ /dev/null
@@ -1,49 +0,0 @@
-Permissive Binary License
-
-Version 1.0, September 2018
-
-Redistribution.  Redistribution and use in binary form, without
-modification, are permitted provided that the following conditions are
-met:
-
-1) Redistributions must reproduce the above copyright notice and the
-   following disclaimer in the documentation and/or other materials
-   provided with the distribution.
-
-2) Unless to the extent explicitly permitted by law, no reverse
-   engineering, decompilation, or disassembly of this software is
-   permitted.
-
-3) Redistribution as part of a software development kit must include the
-   accompanying file named �DEPENDENCIES� and any dependencies listed in
-   that file.
-
-4) Neither the name of the copyright holder nor the names of its
-   contributors may be used to endorse or promote products derived from
-   this software without specific prior written permission.
-
-Limited patent license. The copyright holders (and contributors) grant a
-worldwide, non-exclusive, no-charge, royalty-free patent license to
-make, have made, use, offer to sell, sell, import, and otherwise
-transfer this software, where such license applies only to those patent
-claims licensable by the copyright holders (and contributors) that are
-necessarily infringed by this software. This patent license shall not
-apply to any combinations that include this software.  No hardware is
-licensed hereunder.
-
-If you institute patent litigation against any entity (including a
-cross-claim or counterclaim in a lawsuit) alleging that the software
-itself infringes your patent(s), then your rights granted under this
-license shall terminate as of the date such litigation is filed.
-
-DISCLAIMER. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
-CONTRIBUTORS "AS IS." ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
-NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
-TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/targets/TARGET_RDA/TARGET_UNO_91H/lib/README.md b/targets/TARGET_RDA/TARGET_UNO_91H/lib/README.md
deleted file mode 100644
index beec4098036..00000000000
--- a/targets/TARGET_RDA/TARGET_UNO_91H/lib/README.md
+++ /dev/null
@@ -1,7 +0,0 @@
-This directory tree contains binaries build from RDA SDK modified for Mbed OS and released under Permissive Binary License.
-
-libhal files in the subfolders are generated with toolchains:
-
-Arm Compiler 5 - version 5.06u1
-GNU Arm Embedded - version 6.3.1
-IAR EWARM - version 7.80.2
\ No newline at end of file
diff --git a/targets/TARGET_RDA/TARGET_UNO_91H/lib/TOOLCHAIN_ARM_STD/libhal.ar b/targets/TARGET_RDA/TARGET_UNO_91H/lib/TOOLCHAIN_ARM_STD/libhal.ar
deleted file mode 100644
index ec1a7e25a98..00000000000
Binary files a/targets/TARGET_RDA/TARGET_UNO_91H/lib/TOOLCHAIN_ARM_STD/libhal.ar and /dev/null differ
diff --git a/targets/TARGET_RDA/TARGET_UNO_91H/lib/TOOLCHAIN_GCC_ARM/libhal.a b/targets/TARGET_RDA/TARGET_UNO_91H/lib/TOOLCHAIN_GCC_ARM/libhal.a
deleted file mode 100644
index 4a3a8b749a1..00000000000
Binary files a/targets/TARGET_RDA/TARGET_UNO_91H/lib/TOOLCHAIN_GCC_ARM/libhal.a and /dev/null differ
diff --git a/targets/TARGET_RDA/TARGET_UNO_91H/lib/TOOLCHAIN_IAR/libhal.a b/targets/TARGET_RDA/TARGET_UNO_91H/lib/TOOLCHAIN_IAR/libhal.a
deleted file mode 100644
index 3882386a10d..00000000000
Binary files a/targets/TARGET_RDA/TARGET_UNO_91H/lib/TOOLCHAIN_IAR/libhal.a and /dev/null differ
diff --git a/targets/TARGET_RDA/TARGET_UNO_91H/rda_ccfg_api.c b/targets/TARGET_RDA/TARGET_UNO_91H/rda_ccfg_api.c
new file mode 100644
index 00000000000..30525e41ec6
--- /dev/null
+++ b/targets/TARGET_RDA/TARGET_UNO_91H/rda_ccfg_api.c
@@ -0,0 +1,411 @@
+/*
+ * Copyright (c) 2018, Arm Limited and affiliates.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "rda_ccfg_api.h"
+#include "RDA5991H.h"
+
+#define CLK_FREQ_40M            (0x00U)
+#define CLK_FREQ_80M            (0x01U)
+#define CLK_FREQ_160M           (0x02U)
+#define ADDR2REG(addr)          (*((volatile unsigned int *)(addr)))
+
+#define RF_SPI_REG              ADDR2REG(0x4001301CUL)
+#define TRAP_CTRL_REG           ADDR2REG(0x40011000UL)
+#define TRAP0_SRC_REG           ADDR2REG(0x40011004UL)
+#define TRAP0_DST_REG           ADDR2REG(0x40011024UL)
+#define TRAP1_SRC_REG           ADDR2REG(0x40011008UL)
+#define TRAP1_DST_REG           ADDR2REG(0x40011028UL)
+#define SPIF_CFG_REG            ADDR2REG(0x17FFF014UL)
+
+#define SYS_CPU_CLK             CLK_FREQ_160M
+#define AHB_BUS_CLK             CLK_FREQ_80M
+
+extern void core_util_critical_section_enter(void);
+extern void core_util_critical_section_exit(void);
+
+static int ChipHwVersion = 0;
+
+static inline void wr_rf_usb_reg(unsigned char a, unsigned short d, int isusb)
+{
+    core_util_critical_section_enter();
+    while(RF_SPI_REG & (0x01UL << 31));
+    while(RF_SPI_REG & (0x01UL << 31));
+    RF_SPI_REG = (unsigned int)d | ((unsigned int)a << 16) | (0x01UL << 25) | ((isusb) ? (0x01UL << 27) : 0x00UL);
+    core_util_critical_section_exit();
+}
+
+static inline void rd_rf_usb_reg(unsigned char a, unsigned short *d, int isusb)
+{
+    core_util_critical_section_enter();
+    while(RF_SPI_REG & (0x01UL << 31));
+    while(RF_SPI_REG & (0x01UL << 31));
+    RF_SPI_REG = ((unsigned int)a << 16) | (0x01UL << 24) | (0x01UL << 25) | ((isusb) ? (0x01UL << 27) : 0x00UL);
+    __asm volatile ("nop");
+    while(RF_SPI_REG & (0x01UL << 31));
+    while(RF_SPI_REG & (0x01UL << 31));
+    *d = (unsigned short)(RF_SPI_REG & 0xFFFFUL);
+    core_util_critical_section_exit();
+}
+
+/* Power down the debug-usage I2C */
+static inline void rda_ccfg_pdi2c(void)
+{
+    unsigned int val = RDA_PINCFG->MUX2;
+    if(0x00UL == (val & 0x3FUL)) {
+        RDA_PINCFG->MUX2 = val | 0x09UL;
+    }
+    wr_rf_usb_reg(0xA1, 0x0000, 0);
+}
+
+/* Config CPU & Bus clock */
+static inline void rda_ccfg_ck(void)
+{
+    unsigned short val = 0U, cfg = 0U;
+
+    cfg = (RDA_SCU->CORECFG >> 11) & 0x07U;
+    rd_rf_usb_reg(0xA4, &val, 0);
+#if ((SYS_CPU_CLK == CLK_FREQ_160M) && (AHB_BUS_CLK == CLK_FREQ_80M))
+    /* HCLK inv */
+    if(((CLK_FREQ_40M << 1) | CLK_FREQ_40M) == cfg) {
+        val |=  (0x01U << 12);
+    }
+#endif /* CLK_FREQ_160M && CLK_FREQ_80M */
+    /* Config CPU & BUS clock */
+    cfg ^=  (((SYS_CPU_CLK << 1) | AHB_BUS_CLK) & 0x07U);
+    val &= ~(0x07U << 9);   /* bit[11:10] = 2'b00:40M, 2'b01:80M, 2'b1x:160M */
+    val |=  (cfg   << 9);   /* bit[9] = 1'b0:40M, 1'b1:80M */
+    val &= ~(0x01U);        /* i2c_wakeup_en */
+    wr_rf_usb_reg(0xA4, val, 0);
+}
+
+/* Config SPI flash clock */
+static inline void rda_ccfg_spifck(void)
+{
+    unsigned int val;
+    __DSB();
+    val = SPIF_CFG_REG & ~(0x00FFUL << 8);
+    SPIF_CFG_REG = val |  (0x0004UL << 8); // divider
+    __DSB();
+}
+
+/* Handle abort booting */
+static inline int rda_ccfg_abort_hdlr(void)
+{
+    int ret = 0;
+    unsigned short val = 0U;
+    rd_rf_usb_reg(0xA1, &val, 0);
+    ret = (int)((val >> 2) & 0x01U);
+    if(ret) {
+        unsigned short val2 = 0U;
+        rd_rf_usb_reg(0xB2, &val2, 0);
+        wr_rf_usb_reg(0xB2, (val2 | (0x01U << 11)), 0);
+        RDA_GPIO->PCCTRL |= (0x01UL << 31);  // set abort flag
+        for(val = 0; val < 0x00FFU; val++) { // delay
+            ;
+        }
+        wr_rf_usb_reg(0xB2, (val2 & ~(0x01U << 11)), 0);
+    }
+    return ret;
+}
+
+/* Power up the always-on timer */
+void rda_ccfg_aontmr(void)
+{
+    unsigned short val = 0U;
+    rd_rf_usb_reg(0xA3, &val, 0);
+    if (0x00U == (val & (0x01U << 12))) {
+        wr_rf_usb_reg(0xA3, (val | (0x01U << 12)), 0);
+    }
+}
+
+/* Config clock source of always-on timer */
+void rda_ccfg_aontmr_cksrc(int cksrc)
+{
+    unsigned short val;
+    if(0 == cksrc) { // use lpo 32K clk, hw default
+        wr_rf_usb_reg(0xDD, 0x5100U, 0);
+        rd_rf_usb_reg(0xD8, &val, 0);
+        wr_rf_usb_reg(0xD8, (val & ~(0x03U << 14)), 0);
+        rd_rf_usb_reg(0xA8, &val, 0);
+        val |= ((0x01U << 10) | (0x01U << 14));
+        wr_rf_usb_reg(0xA8, (val & ~(0x01U << 12)), 0);
+    } else { // use 6m5xtal 32K clk, more accurate
+        int idx;
+        wr_rf_usb_reg(0xDD, 0x8100U, 0);
+        rd_rf_usb_reg(0xD8, &val, 0);
+        wr_rf_usb_reg(0xD8, (val | (0x01U << 15)), 0);
+        for(idx = 0; idx < 5; idx++) { // for dealy
+            rd_rf_usb_reg(0x00, &val, 0);
+        }
+        wr_rf_usb_reg(0xDD, 0x9100U, 0);
+        rd_rf_usb_reg(0xD8, &val, 0);
+        wr_rf_usb_reg(0xD8, (val | (0x01U << 15) | (0x01U << 14)), 0);
+        rd_rf_usb_reg(0xA8, &val, 0);
+        val &= ~((0x01U << 10) | (0x01U << 14));
+        wr_rf_usb_reg(0xA8, (val | (0x01U << 12)), 0);
+    }
+}
+
+/* Config GPIO6 to dig core */
+void rda_ccfg_gp6(unsigned short cfg)
+{
+    unsigned short val = 0U;
+    rd_rf_usb_reg(0xCD, &val, 0);
+    val &= ~(0x01U << 11);
+    wr_rf_usb_reg(0xCD, (val | ((cfg & 0x01U) << 11)), 0);
+}
+
+/* Config GPIO7 to dig core */
+void rda_ccfg_gp7(unsigned short cfg)
+{
+    unsigned short val = 0U;
+    rd_rf_usb_reg(0xB0, &val, 0);
+    val &= ~(0x01U << 14);
+    wr_rf_usb_reg(0xB0, (val | ((cfg & 0x01U) << 14)), 0);
+}
+
+/* Config GPIO6/7/8/9 to pmu intf or dig core */
+void rda_ccfg_gp(unsigned char gp, unsigned short cfg)
+{
+    unsigned short val = 0U;
+    unsigned char  reg = 0xCDU;
+    const int ofs_lst[4] = {11, 14, 10, 9};
+    if((6 > gp) || (9 < gp)) {
+        return;
+    }
+    if(7 == gp) {
+        reg = 0xB0U;
+    }
+    rd_rf_usb_reg(reg, &val, 0);
+    val &= ~(0x01U << ofs_lst[gp - 6]);
+    wr_rf_usb_reg(reg, (val | ((cfg & 0x01U) << ofs_lst[gp - 6])), 0);
+}
+
+/* Set some core config when booting */
+int rda_ccfg_boot(void)
+{
+    int ret = 1;
+    int abort_flag = rda_ccfg_abort_hdlr();
+    if(!abort_flag) {
+        rda_ccfg_pdi2c();
+    }
+    /*close usb polling*/
+    RDA_GPIO->CTRL &= ~(0x01UL << 12);
+    rda_ccfg_ck();
+    /* Set flash clock */
+    rda_ccfg_spifck();
+    /* Set aon timer clock source */
+    rda_ccfg_aontmr_cksrc(1);
+    return ret;
+}
+
+/* Reset CPU & Bus clock config */
+void rda_ccfg_ckrst(void)
+{
+    unsigned short val = 0U;
+
+    rd_rf_usb_reg(0xA4, &val, 0);
+    /* HCLK inv */
+    val &= ~(0x01U << 12);
+    /* Config CPU clock */
+    val &= ~(0x03U << 10);
+    val |=  (0x00U << 10); /* 2'b00:40M, 2'b01:80M, 2'b1x:160M */
+    /* Config BUS clock */
+    val &= ~(0x01U << 9);
+    val |=  (0x00U << 9);  /* 1'b0:40M, 1'b1:80M */
+    wr_rf_usb_reg(0xA4, val, 0);
+}
+
+/* Reset peripheral module */
+void rda_ccfg_perrst(void)
+{
+    unsigned int idx = 0x0FUL;
+    RDA_SCU->RESETCTRL &= ~(0x01UL << 11); // soft_resetn_bb
+    for (; idx>0; idx--);
+    RDA_SCU->RESETCTRL |=  (0x01UL << 11);
+}
+
+/* Init ADC module */
+void rda_ccfg_adc_init(void)
+{
+    unsigned short val = 0U;
+    rd_rf_usb_reg(0xA3, &val, 0); /* adc en */
+    wr_rf_usb_reg(0xA3, (val | (0x01U << 3)), 0);
+    rd_rf_usb_reg(0xD8, &val, 0); /* clk 6p5m en */
+    wr_rf_usb_reg(0xD8, (val | (0x01U << 15)), 0);
+    rd_rf_usb_reg(0xB7, &val, 0); /* clk 26m en */
+    wr_rf_usb_reg(0xB7, (val | (0x01U << 14)), 0);
+}
+
+/* Config GPIO6/7/8 pdn or pup for ADC usage */
+void rda_ccfg_adc_gp(unsigned char gp, unsigned short cfg)
+{
+    unsigned short val = 0U;
+    const int ofs_lst[3] = {8, 9, 7};
+    if((6 > gp) || (8 < gp)) {
+        return;
+    }
+    rd_rf_usb_reg(0xB2, &val, 0);
+    val &= ~(0x01U << ofs_lst[gp - 6]);
+    wr_rf_usb_reg(0xB2, (val | ((cfg & 0x01U) << ofs_lst[gp - 6])), 0);
+}
+
+/* Config GPADC oenb, use be config to 1 in either Normal mode or GPADC mode */
+void rda_ccfg_adc_oenb(unsigned char ch, unsigned short cfg)
+{
+    unsigned short val = 0U;
+    unsigned char offset = 0U;
+    int ver = rda_ccfg_hwver();
+
+    if ((ch > 1) || (cfg > 1))
+        return;
+
+    if (0 == ch) {
+        offset = 2;
+    } else {
+        if (ver <= 2)
+            offset = 3;
+        else if (ver >= 4)
+            offset = 1;
+    }
+
+    rd_rf_usb_reg(0xB0, &val, 0);
+    val &= ~(0x01U << offset);
+    val |= (cfg << offset);
+    wr_rf_usb_reg(0xB0, val, 0);
+}
+
+/* Read ADC value */
+unsigned short rda_ccfg_adc_read(unsigned char ch)
+{
+    unsigned short val = 0U;
+    rd_rf_usb_reg(0xB7, &val, 0); /* set vref */
+    val &= ~((0x03U) << 12); /* verf 1.7V */
+    if(!((2U == ch) && (rda_ccfg_hwver() <= 4))) {
+        val |= ((0x02U) << 12); /* verf 2.0V */
+    }
+    wr_rf_usb_reg(0xB7, val, 0);
+
+    rd_rf_usb_reg(0xB6, &val, 0); /* channel select */
+    val &= ~((0x03U) << 12);
+    wr_rf_usb_reg(0xB6, (val | ((ch & 0x03U) << 12)), 0);
+
+    rd_rf_usb_reg(0xB6, &val, 0); /* set read en */
+    wr_rf_usb_reg(0xB6, (val | (0x01U << 2)), 0);
+    for(val = 0; val < 0x0FFU; val++) { // delay
+        ;
+    }
+    rd_rf_usb_reg(0xB6, &val, 0); /* clr read en */
+    wr_rf_usb_reg(0xB6, (val & ~(0x01U << 2)), 0);
+
+    do {
+        rd_rf_usb_reg(0xB7, &val, 0); /* finish loop flag */
+    } while(0x00U == (val & (0x01U << 10)));
+    return (val & 0x03FFU);
+}
+
+/* Free ADC module */
+void rda_ccfg_adc_free(void)
+{
+    unsigned short val = 0U;
+    rd_rf_usb_reg(0xA3, &val, 0); /* adc disable */
+    wr_rf_usb_reg(0xA3, (val & ~(0x01U << 3)), 0);
+    rd_rf_usb_reg(0xB7, &val, 0); /* clk 26m disable */
+    wr_rf_usb_reg(0xB7, (val & ~(0x01U << 14)), 0);
+}
+
+/* Get abort flag */
+int rda_ccfg_abort_flag(void)
+{
+    int ret = 0;
+    if(0x00UL != (RDA_GPIO->PCCTRL & (0x01UL << 31))) {
+        ret = 1;
+    }
+    return ret;
+}
+
+/* Set wdt en */
+void rda_ccfg_wdt_en(void)
+{
+    unsigned short val = 0U;
+    rd_rf_usb_reg(0xC8, &val, 0);
+    wr_rf_usb_reg(0xC8, (val | (0x01U << 13)), 0);
+}
+
+unsigned short rf_reg_read(unsigned short addr)
+{
+    unsigned short val = 0U;
+    if(addr <= 0x1FF) {
+        if((((addr & 0xFFU) >= 0xA0) && ((addr & 0xFFU) <= 0xDF)) ||
+            (addr == 0x30U) || (addr == 0x34U) || (addr == 0x35U))  { /* PMU & RF_30H/34H/35H */
+            rd_rf_usb_reg((unsigned char)(addr & 0xFFU), &val, 0);
+        } else { /* RF */
+            char isrun = 0;
+            rd_rf_usb_reg(0x30U, &val, 0);
+            isrun = (val & 0x01U) ? 1 : 0;
+            if(isrun) {
+                wr_rf_usb_reg(0x02U, (0x5000U | addr), 0);
+                rd_rf_usb_reg(0x34U, &val, 0);
+            } else {
+                if(addr & (0x01U << 8)) {
+                    wr_rf_usb_reg(0x3FU, 1, 0);
+                }
+                rd_rf_usb_reg((unsigned char)(addr & 0xFFU), &val, 0);
+                if(addr & (0x01U << 8)) {
+                    wr_rf_usb_reg(0x3FU, 0, 0);
+                }
+            }
+        }
+    }
+    return val;
+}
+
+void rf_reg_write(unsigned short addr, unsigned short val)
+{
+    if(addr <= 0x1FF) {
+        if((((addr & 0xFFU) >= 0xA0) && ((addr & 0xFFU) <= 0xDF)) ||
+            (addr == 0x30U) || (addr == 0x34U) || (addr == 0x35U)) { /* PMU & RF_30H/34H/35H */
+            wr_rf_usb_reg((unsigned char)(addr & 0xFFU), val, 0);
+        } else { /* RF */
+            char isrun = 0;
+            rd_rf_usb_reg(0x30U, &val, 0);
+            isrun = (val & 0x01U) ? 1 : 0;
+            if(isrun) {
+                wr_rf_usb_reg(0x32U, val, 0);
+                wr_rf_usb_reg(0x02U, (0x4000U | addr), 0);
+            } else {
+                if(addr & (0x01U << 8)) {
+                    wr_rf_usb_reg(0x3FU, 1, 0);
+                }
+                wr_rf_usb_reg((unsigned char)(addr & 0xFFU), val, 0);
+                if(addr & (0x01U << 8)) {
+                    wr_rf_usb_reg(0x3FU, 0, 0);
+                }
+            }
+        }
+    }
+}
+
+/* Get chip hw version */
+int rda_ccfg_hwver(void)
+{
+    if(0 == ChipHwVersion) {
+        ChipHwVersion = (int)((RDA_GPIO->REVID >> 16) & 0xFFUL) + 1;
+    }
+    return ChipHwVersion;
+}
+