SHANGHAI SIMCOM LIMITED
27
SIMT1502 must be provided voltage by external voltage source.
See
Table4-10
for more details.
Table4-10 Battery connector description
Signal
Pin#
Description
Direction
AI
/
AO
BAT_THERM
90
Battery therm monitor
AI
VBATT
88/92/124(No External Charging IC)
Battery positive supply
AI
VBATT
88 (With External Charging IC)
Battery positive supply
AI
GND
2/32/43/46/62/73/80/91/95/
114/123/125/126/127/128
Ground
-
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#
Description
Direction
I
/
O
GPIO_4
26
UART1 TX
O
GPIO_5
27
UART1 RX
I
GPIO_6
24
UART1 CTS_N
I
GPIO_7
25
UART1 RTS_N
O
GPIO_20
38
UART2 TX
O
GPIO_21
39
UART2 RX
I
GPIO_111
28
UART2 CTS_N
I
GPIO_112
29
UART2 RTS_N
O
Figure4-7 UART application diagram
Summary of Contents for SIMT 1502
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