UPD780921 datasheet(12/40 Pages) RENESAS

12 / 40 page

µPD780921, 780922, 780923, 780924

3.2 NON PORT PINS

INTP0

Input

External interrupt input that can specify the effective edge

Input

P00/TOFF7

INTP1

(rising edge, falling edge, or both rising and falling edges) can be

Input

P01

INTP2

specified.

Input

P02

INTP3

Input

P03/ADTRG

TI50

Input

External count clock input to timer (TM50).

Input

P24/TO50

TI51

External count clock input to timer (TM51).

Input

P25/TO51

TI52

External count clock input to timer (TM52).

Input

P26/TO52

TO50

Output

Timer (TM50) output.

Input

P24/TI50

TO51

Timer (TM51) output.

Input

P25/TI51

TO52

Timer (TM52) output.

Input

P26/TI52

RTP0 to RTP7 Output

Real-time output port that outputs pulses in synchronization with

Input

P30 to P37

trigger signals outputs from the real-time pulse unit.

TxD00

Output

Asynchronous serial interface serial data output.

Input

P21

TxD01

Input

P23

RxD00

Input

Asynchronous serial interface serial data input.

Input

P20

RxD01

Input

P22

ANI0 to ANI7 Input

A/D converter analog input.

Input

P10 to P17

ADTRG

Input

External trigger signal input to the A/D converter.

Input

P03/INTP3

TO70 to TO75 Output

Timer output for the 3-phase PWM inverter control.

Hi-Z

–

TOFF7

Input

Timer output (TO70 to TO75) stop interrupt input.

Input

P00/INTP0

AD0 to AD7

I/O

Lower address/data bus when memory is expanded externally.

Input

P40 to P47

A8 to A15

Output

Upper address bus when memory is expanded externally.

Input

P50 to P57

Output

Strobe signal output for external memory read operation.

Input

P64

Strobe signal output for external memory write operation.

Input

P65

WAIT

Input

Wait insertion when accessing external memory.

Input

P66

ASTB

Output

Strobe output that externally latches address information output

Input

P67

to ports 4 and 5 to access external memory.

AVREF

Input

A/D converter reference voltage input.

–

AVDD

–

A/D converter analog power supply. Connect to VDD0.–

–

AVSS

–

A/D converter ground potential. Connect to VSS0.–

–

RESET

Input

System reset input.

–

Input

Crystal connection for system clock oscillation.

–

––

VDD0

–

Positive power supply for ports.

–

VSS0

–

Ground potential for ports.

–

VDD1

–

Positive power supply except for ports.

–

VSS1

–

Ground potential except for ports.

–

TEST

–

Test mode set pin. Connect to VSS0 directly.

–

Pin Name

I/O

Function

After Reset

Alternate

Function

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