SZF2002 datasheet(9/76 Pages) PHILIPS

9 / 76 page

1998 Aug 26

Philips Semiconductors

Product speciﬁcation

Low voltage 8-bit microcontroller with

6-kbyte embedded RAM

SZF2002

Note

1. The pin layout has been optimized for easy connection of 256 kbytes Flash ROM (e.g. ATMEL AT29LV010A,

SGS-Thomson M28V201, or AMD Am29F010).

General

PWM

Pulse Width Modulation output.

RST

Reset. A HIGH level on this pin for at least 12 clock cycles resets the device.

XCLK

Clock input.

External Access. When EA is HIGH the CPU executes out of internal program

memory (unless the program counter exceeds 7FFFH). A LOW EA forces the CPU to

execute out of external memory regardless of the value of the Program Counter. This

signal is latched at the falling edge of reset (RST pin). The EA pin has an internal

pull-down. When it is not connected the CPU executes from external memory.

DEBUG

DEBUG enable. If HIGH, forces standard 80C51 timing signals output at address and

databus. In this mode the databus is multiplexed with the lower 8 bits of the address

bus, and the A0 to A3 lines are used for the RD, WR, ALE and PSEN signals. This

allows a standard 80C51 in-circuit emulator to be connected. For normal operation

connect DEBUG to VSS.

Power

VDD

10, 50,

Power supply digital core and digital I/O pads.

VSS

11, 51,

Ground: circuit ground potential.

VDDA

Analog power.

VSSA

Analog ground.

n.c.

1, 20,

21, 40,

41, 60,

61, 80

Not connected.

SYMBOL

DESCRIPTION

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