7540 datasheet(361/366 Pages) RENESAS

361 / 366 page

3-139

REJ09B0018-0200Z

Rev.2.00

Jun 21, 2004

7540 Group

APPENDIX

3.11 Differences between 7540 Group and 7531 Group

Table 3.11.1 shows the differences between 7540 Group and 7531 Group.

Table 3.11.1 Differences between 7540 Group and 7531 Group

(Performance overview)

7531 Group

8 to 16 K bytes

256 to 384 bytes

Initial value: FF16

(Ports P0 and P3 pull-up On)

11 sources, 8 vector

(3 for external)

12 sources, 8 vector

(4 for external)

3 (Timer 1, 2, X)

UART only

Cecamic oscillator/

Quartz-crystal oscillator/

RC oscillation

Parameter

Number of basic instructions

Memory sizes

Input/Output

ports

Interrupt

sources

16-bit timer

8-bit timer

Serial I/O1

Clock generation circuit

Oscillation stop detection circuit

ROM

RAM

32-pin version

36-pin version

7540 Group

71 (DIV, MUL instruction added)

16 to 32 K bytes

512 to 768 bytes

Initial value: 0016

(Ports P0 and P3 pull-up Off)

14 sources, 14 vector

(4 for external)

15 sources, 15 vector

(5 for external)

1 (Timer A)

3 (Timer 1, X, Y, Z)

Clock synchronous/UART

Cecamic oscillator/

Quartz-crystal oscillator/

RC oscillation/

On-chip oscillator oscillation

7540 Datasheet(PDF) 361 Page - Renesas Technology Corp

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