Data Sheet

NUC123
May 3, 2017 Page 26 of 99 Rev.2.04
NUC123 SERIES DATASHEET
XT1_OUT
O
External 4~24 MHz high speed crystal output pin
57
45
30
PF.1
I/O
Digital GPIO pin
XT1_IN
I
External 4~24 MHz high speed crystal input pin
58
46
31
nRESET
I
External reset input: Low active, set this pin low reset chip to
initial state. With internal pull-up.
59
V
SS
P
Ground
60
V
DD
P
Power supply for I/O ports and LDO source for internal PLL
and digital circuit. Voltage range is 2.5 V ~ 5V.
61
47
PF.2
I/O
Digital GPIO pin
ADC6
AI
ADC channel 6 analog input pin
I2C0_SDA
I/O
I
2
C0 data input/output pin
PS2_DAT
I/O
PS/2 data pin
62
48
PF.3
I/O
Digital GPIO pin
ADC7
AI
ADC channel 7 analog input pin
I2C0_SCL
I/O
I
2
C0 clock pin
PS2_CLK
I/O
PS/2 clock pin
63
1
32
PV
SS
P
PLL ground
64
2
PB.8
I/O
Digital GPIO pin
TM0
I/O
Timer0 event counter input / toggle output pin
Note: Pin Type I = Digital Input, O = Digital Output; AI = Analog Input; P = Power Pin; AP = Analog Power