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SC806Hardware User ManualPage34 of 70
3.5
UARTInterface
The SC806 defines two UART interfaces and three I2Cs. It also supports multiplexed SPI. Please contact our
technical support when you need it.
The SC806 serial interface is 1.8V level. If the peripheral is at other levels, level shift is required.
Table12UART interface pin definition
Pin No.
Pin Name
I/O
Description
Note
34
UART2_TX
DO
UART2 data transmission
35
UART2_RX
DI
UART2 data reception
36
UART2_CTS
DI
UART2 clear transmission
37
UART2_RTS
DO
UART2 request transmission
94
UART1_TX
DO
UART1 data transmission, the
default is debug interface
93
UART1_RX
DI
UART1 data reception, the default
is debug interface
3.6
USIMInterface
The SC806 supports two SIM cards, dual-card dual standby (the software defaults is one card standby), and both
are hot pluggable (requires software configuration).
Table13USIM pin definition
Pin No.
Pin Name
I/O
Description
Note
26
VDD_USIM1_L14
PO
USIM1 power supply, 1.8V/2.95V
25
USIM1_DIO
I/O
USIM1 data signal
24
USIM1_CLK
DO
USIM1 clock signal
23
USIM1_RST
DO
USIM1 reset signal