7/22

¡ Semiconductor

MSM65522/65P522

Secondary Functions

Function

Symbol

Type

Description

Serial

Port

RXD

I/O

P2.0 secondary functions.

UART: Input pin for a synchronous communication receive data.

Synchronous: Input/output pin for serial port transmit/receive data.

TXD

O

P2.1 secondary functions.

UART: Input pin for a synchronous communication receive data.

Synchronous: Output pin for serial port synchronizing clock.

External

interrupt

INT0

I

Secondary function of P2.2 input pin for external interrupt 0.

The interrupt can be triggered by the rising edge, falling edge, or both

edges of rising or falling.

INT1/Gate

I

Secondary function of P2.3 input pin for external interrupt 1.

The interrupt can be triggered by the rising edge, falling edge, or both

rising and falling edges. Also used as a gate signal input pin for gating

the counter of timer 0.

INT2

I

Secondary function of P3.4 input pin for external interrupt 2.

The interrupt can be triggered by the rising edge, falling edge, or both

rising and falling edges.

HSTOP

I

Secondary function of P2.0 input pin for hardware stop mode. If this pin goes

low while the HSTP bit in SBYCON is set to 1, the chip enters hard stop

mode. In hardware stop mode the clock stops and the CPU and on-chip

peripheral functions shut down to conserve power.

Control

SFTO

O

Shift

Registers

P3.5 secondary functions.

Shift register data output pin.

SFTI

I

P3.6 secondary functions.

Shift register data output pin.

SFTCK

I/O

P3.7 secondary functions.

Shift register synchronizing clock input/output pin.

In master mode: clock output

In slave mode: clock input

T0CK

I

Secondary function of P2.4: external clock input pin for timer 0.

Timer 0

T1OUT

O

Secondary function of P2.7: outputs a waveform with twice the cycle of

the overflow interval of timer 1.

Timer 1

AI0

to

AI7

O

Secondary function of P6.0 to P6.7: functions as analog input channel in

A/D conversion.

A/D

Converter