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5.3.10 UART
Signal
Type
Signal
Level
Description
UART0_TX
O
3.3V
Serial data transmit
UART0_RX
I
3.3V
Serial data receive
UART0_CTS#
I
3.3V
Handshake signal: ready to send data
UART0_RTS#
O
3.3V
Handshake signal: ready to receive data
5.3.11 Misc
Signal
Type
Signal
Level
Description
WDTRIG#
I
3.3V
Watchdog trigger signal
WDOUT
O
3.3V
Watchdog event indicator
SMB_CLK
GP1_I2C_CLK
O
3.3V
Clock line of System Management Bus.
Alternate function I2C Bus
clock line
SMB_DAT
GP1_I2C_DAT
I/O
3.3V
Data line of System Management Bus. Alternate function I2C Bus data
line
SMB_ALERT#
I
3.3V
System Management Bus Alert input
SPKR
GP_PWM_OUT2
O
3.3V
Audio enunciator output. Alternate function general purpose PWM
output
BIOS_DISABLE#
/BOOT_ALT#
I
3.3V
Disables the onboard bootloader and uses the one the SD card instead.
If no bootloader is available on the SD card it falls back to USB recovery
mode
GP_1-Wire_Bus
I/O
3.3V
General Purpose 1-Wire bus interface
THRM#
I
3.3V
Thermal Alarm active low signal generated by the external hardware
to indicate an over temperature situation. This signal can be used to
initiate thermal throttling
THRMTRIP#
O
3.3V
Thermal Trip indicates an overheating condition of the processor. If
‘THRMTRIP#’ goes active the system immediately transitions to the
S5 State (Soft Off )
FAN_PWMOUT
/GP_PWM_OUT1
O
3.3V
PWM output for fan speed control. Alternate function general purpose
PWM output. Function based on microcontroller firmware
FAN_TACHOIN
/GP_TIMER_IN
I
3.3V
Fan tachometer input. Alternate function general purpose timer input.
Function based on microcontroller firmware
Release v0.2-3-g574c114
Page
42
Содержание RK3399-Q7
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