83C748 datasheet(13/18 Pages) PHILIPS

Part #	83C748

Description	80C51 8-bit microcontroller family 2K/64 OTP/ROM, low pin count

PDF	18 Pages

Scroll/Zoom	100%

Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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13 / 18 page

Philips Semiconductors

Preliminary specification

83C748/87C748

80C51 8-bit microcontroller family

2K/64 OTP/ROM, low pin count

1999 Apr 15

A0–A10

ADDRESS STROBE

PROGRAMMING

PULSES

VPP/VIH VOLTAGE

SOURCE

CLK SOURCE

RESET

CONTROL

LOGIC

87C748

P3.0–P3.7

P0.0/ASEL

P0.1

P0.2

XTAL1

RESET

VCC

VSS

P1.0–P1.7

+5V

DATA BUS

SU00301

Figure 5. Programming Configuration

MIN 2 MACHINE

CYCLES

TEN BIT SERIAL CODE

BIT 0

BIT 1

BIT 2

BIT 3

BIT 4

BIT 5

BIT 6

BIT 7

BIT 8

BIT 9

UNDEFINED

XTAL1

RESET

P0.2

P0.1

SU00302

Figure 6. Entry into Program/Verify Modes

12.75V

25 PULSES

tSHGL

tGHSL

tGLGH

tGHGL

µs MIN

tMASEL

tHASET

tADSTA

tDVGL

tGHDX

tAVQV

VERIFY MODE

PROGRAM MODE

VERIFY MODE

P0.2 (VPP)

P0.1 (PGM)

P0.0 (ASEL)

PORT 3

PORT 1

INVALID DATA

VALID DATA

DATA TO BE PROGRAMMED

INVALID DATA

VALID DATA

HIGH ADDRESS

LOW ADDRESS

tHAHLD

tAVGL

SU00303

Figure 7. Program/Verify Cycle

83C748 Datasheet(PDF) 13 Page - NXP Semiconductors

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