I2C; Spi - SimCom SIMT 1502 Manual

SHANGHAI SIMCOM LIMITED

4.12.2 I2C

SIMT1502 contains two groups special functional and four groups configurable I2C, which
multiplexed with UART function. I2C pins use GPIOs configured as open-drain outputs; the
pull-up resistor(2.2K) must be provided by external circuit(1.8V).
High speed mode I2C running at 3.4 MHz.
See Table4-12
Table4-12 I2C interface description
Signal Pin#
TS_I2C_SDA
TS_I2C_SCL
CCI_I2C_SDA
CCI_I2C_SCL
The rest of I2C interface is multiplexed with UART function.
See Table4-13 for more details.
Table4-13 I2C interface alternate function description
Signal Pin#
GPIO_6 24
GPIO_7 25
GPIO_111 28
GPIO_112 29
GPIO_14 22
GPIO_15 23
GPIO_10 110
GPIO_11 111

4.12.2 SPI

SIMT1502 contains three groups configurable SPI, which multiplexed with UART/I2C function.
But, SIMT1502 only be used for master device.
See Table4-14
Table4-14 SPI interface alternate function description
Description
34 Touchscreen/ SENSORS I2C,SDA
35 Touchscreen/ SENSORS I2C,SCL
63 Camera I2C,SDA
64 Camera I2C,SCL
UART2 CTS_N/GP
UART2 RTS_N/GP
UART2 CTS_N/GP
UART2 RTS_N/GP
SPI4 CS_N/GP
SPI4 CLK/GP
SPI6 CS_N/GP
SPI6 CLK/GP
Alternate function
BLSP#1_I2C_SDA_B
BLSP#1_I2C_SCL_B
BLSP#2_I2C_SDA_B
BLSP#2_I2C_SCL_B
BLSP4#_I2C_SDA_B
BLSP4#_I2C_SCL_B
BLSP6#_I2C_SDA_B
BLSP6#_I2C_SCL_B
Direction
AI/AO
B
DO
B
DO
28