CHAPTER 2. PIN FUNCTIONS

2.1.2List of Pins Other Than Port Pins

Table 2-2 List of Pins Other than Port Pins

Pin Name

Input/Output

Dual-Function Pin

Functions

 

 

 

 

 

 

 

 

 

 

 

 

 

INT0

 

Input

 

P10

An edge-detected vectored interrupt request input pin (detected

 

 

 

 

 

 

 

 

 

 

 

edge selectable by mode register).

 

 

 

 

 

 

 

 

 

 

 

Built in with the noise eliminator by the sampling clock.

 

 

 

 

 

 

 

 

 

 

 

 

 

INT2

 

Input

 

P12

An edge detected external test input pin (rising edge detection).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SI

 

Input

 

P03

A serial data input pin.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SO

Input/output

 

P02/SB0

A serial data output pin.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input/output

 

P01

A serial clock input/output pin.

 

 

SCK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SB0

Input/output

 

P02/SO

A serial bus input/output pin.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PCL

Input/output

 

P22

A clock output pin.

 

 

 

 

 

 

 

 

 

 

 

 

 

X1, X2

 

Input

 

 

 

A system clock oscillation crystal/ ceramic resonator connection

 

 

 

 

 

 

 

 

 

 

 

 

 

 

pin. If supplying the clock from the exterior, input to X1 and input

 

 

 

 

 

 

 

 

 

 

 

the inverted phase to X2.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A system reset input pin. Built in with the noise eliminator by

RESET

 

Input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

analog delay.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VDD

 

 

 

 

 

 

A positive power supply pin.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VSS

 

 

 

 

 

 

A GND potential pin.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NC*8

 

 

 

 

 

 

No Connection

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Remarks For the status of each pin at reset, see CHAPTER 8 “RESET FUNCTION”.

*If using the μPD75P402 and the printed circuit board commonly, the NC pin should be connected directly to VSS.

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NEC PD75402A, PD75P402 user manual SCK SB0, Reset