Use Instructions

L710HG Hardware Design
17
UIM_RESET 13 DO UIM Reset
UIM_CLK 12 DO UIM Clock
USIM_VDD 16 PO
UIM Card Power output, output, only support
1.8V SIM
Current is less than 50mA.
USIM_PRESE
NT
15 DI
USIM hot-plug detection (default low level
valid)
SPI interface
Pin Name Pin No. I/O Description Content
SPI_CS 1
DO SPI_CS ,SPI chip select
If not use keep it
open.
DI UART_CTS，Clear to Send
SPI_MOSI 2
DO SPI master-out slave-in
DO UART_TX，Transmit Data
SPI_MISO 3
DI SPI master-in slave-out
DI UART_RX，Receive Data
SPI_CLK 4
DO SPI CLOCK
DO UART_RTS，DET Request to send
PCM interface
Pin Name Pin No. I/O Description Content
PCM_MCLK 49 DO PCM decode chip master clock
If use crystal as
the master clock
let this PIN NC,
detail as L
710HG
reference
schematic
PCM_OUT 61
DO PCM_OUT，PCM data output
PCM signals can be
reused as I2S
signals
IO I2S_D1, I2S audio data signal 1
PCM_IN 62
DI PCM_IN，PCM data input
IO I2S_D0，I2S audio data signal 0
PCM_SYNC 63
DO PCM_SYNC, PCM data frame sync signal
DO I2S_WS，I2S audio signal byte selection
PCM_CLK 64
DO PCM_CLK，PCM data bit clock
DO I2S_SCK，I2S audio clock signal
FULL UART
Pin Name Pin No. I/O Description Content
RTS 51 DI DET Request to send.
If not use keep it
open.
CTS 52 DO Clear to Send.
If not use keep it
open.
RX 53 DI Receive Data.
If not use keep it
open.