I2C , Uart And Spi Interface; Uart - SimCom SIMT 1502 Manual

SHANGHAI SIMCOM LIMITED
SIMT1502 must be provided voltage by external voltage source.
See Table4-10 for more details.
Table4-10 Battery connector description
Signal
BAT_THERM
VBATT 88/92/124(No External Charging IC)
VBATT 88 (With External Charging IC)
2/32/43/46/62/73/80/91/95/
GND
114/123/125/126/127/128

4.12 I2C , UART and SPI interface

4.12.1 UART

SIMT1502 contains two groups UART_DM .The UART_DM is used to support high-speed
UART operation up to 4 Mbps for debug and system log. UART only supports Slow_IrDA.
See Table4-11 and Figure4-7 for more details:
Table4-11 UART interface description
Signal Pin#
GPIO_4 26
GPIO_5 27
GPIO_6 24
GPIO_7 25
GPIO_20 38
GPIO_21 39
GPIO_111 28
GPIO_112 29
Figure4-7 UART application diagram
Pin#
90
Description
UART1 TX
UART1 RX
UART1 CTS_N
UART1 RTS_N
UART2 TX
UART2 RX
UART2 CTS_N
UART2 RTS_N
Direction
Description
Battery therm monitor
Battery positive supply
Battery positive supply
Ground
Direction
AI/AO
AI
AI
AI
-
I/O
O
I
I
O
O
I
I
O
27