80C51 datasheet(22/22 Pages) PHILIPS

22 / 22 page

Philips Semiconductors

Product specification

80C31/80C51/87C51

CMOS single-chip 8-bit microcontrollers

1996 Aug 16

3-24

EPROM PROGRAMMING AND VERIFICATION CHARACTERISTICS

Tamb = 21°C to +27°C, VCC = 5V±10%, VSS = 0V (See Figure 16)

SYMBOL

PARAMETER

MIN

MAX

UNIT

VPP

Programming supply voltage

12.5

13.0

IPP

Programming supply current

1/tCLCL

Oscillator frequency

MHz

tAVGL

Address setup to PROG low

48tCLCL

tGHAX

Address hold after PROG

48tCLCL

tDVGL

Data setup to PROG low

48tCLCL

tGHDX

Data hold after PROG

48tCLCL

tEHSH

P2.7 (ENABLE) high to VPP

48tCLCL

tSHGL

VPP setup to PROG low

µs

tGHSL

VPP hold after PROG

µs

tGLGH

PROG width

110

µs

tAVQV

Address to data valid

48tCLCL

tELQZ

ENABLE low to data valid

48tCLCL

tEHQZ

Data float after ENABLE

48tCLCL

tGHGL

PROG high to PROG low

µs

PROGRAMMING

VERIFICATION

ADDRESS

DATA IN

DATA OUT

LOGIC 1

LOGIC 0

tAVQV

tEHQZ

tELQV

tSHGL

tGHSL

tGLGH

tGHGL

tAVGL

tGHAX

tDVGL

tGHDX

P1.0–P1.7

P2.0–P2.4

PORT 0

ALE/PROG

EA/VPP

P2.7

ENABLE

SU00020

tEHSH

NOTE:

FOR PROGRAMMING VERIFICATION SEE FIGURE 13.

FOR VERIFICATION CONDITIONS SEE FIGURE 15.

Figure 16. EPROM Programming and Verification

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