NEC Release-it Hardware Manual page 11

Connector to Temp/Humid Sensor, CN8, MAC8 HDB-1-1-4P
CN8 Name MCU Pin
1 SCK P04/SCK11
2 VDD VDD
3 GND GND
4 DATA P05/SSI11/TI001
CHAPTER 1 INTRODUCTION
Description
Output from MCU
5.0V
Input/Output with MCU
1pin
Board Edge
4pin
CN8 Pin Configuration
UM U17586EE1V0UM00 11