User Manual

15
P1 Port Pin Assignments
Pin#
Pin Name Type Description Voltage Range
1
UART_CTS I
UART clear to send, active
low
Vih: 0.7 X VDD – VDD + 0.4V
Vil: -0.4V -- 0.4 VDD
2
UART_RTS O
UART request to send, active
low
Voh: 0.75 X VDD
Vol: 0 – 0.4V
3
VDD I HM Power In
Input voltage: 4.30V – 5.75V
4
UART_TXD O
UART data output, active
high
Voh: 0.75 X VDD
Vol: 0 – 0.4V
4
UART_RXD I UART data input, active high
Vih: 0.7 X VDD – VDD + 0.4V
Vil: -0.4V -- 0.4 VDD
6
GND Power System ground
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