P89C738 datasheet(39/64 Pages) PHILIPS

39 / 64 page

1998 Apr 07

Philips Semiconductors

Product speciﬁcation

8-bit Flash microcontrollers

P89C738; P89C739

Notes

1. CE and OE must be fixed HIGH during VPP transition from ‘5 to 12 V’ or from ‘12 to 5 V’.

2. to(dis) defined as the time at which the output achieves the open circuit condition and data is no longer driven.

th(Vpp)

VPP hold time

100

−−

to(dis)

output disable time; note 2

−

tACC(DATA)

DATA polling/toggle bit access time

−

150

−

tE(tot)

total erase time in auto-chip-erase

−

tP(tot)

total programming time in auto-verify

−

300

SYMBOL

PARAMETER

MIN.

TYP.

MAX.

UNIT

16.12.1 AUTOMATIC PROGRAMMING

One byte data is programmed. Verifying in fast algorithm

and additional programming by external control are not

required because these operations are executed

automatically by the internal control circuit. Programming

completion can be verified by DATA polling (see

Section 16.9.2) and toggle bit (see Section 16.9.1)

checking after automatic verify starts. Device outputs

DATA during programming and DATA after programming

on Q7. Q0 to Q5 are in high-impedance state; Q6 is the

toggle bit (see Section 16.9.1).

Figure 23 shows the timing waveform.

16.12.2 AUTOMATIC ERASE

All the data on the chip is erased. External erase verifying

is not required because data is erased automatically by

internal control circuit. Erasure completion can be verified

by DATA polling and toggle bit checking after automatic

erase starts.

Device outputs a logic 0 during erasure and a logic 1 after

erasure on Q7. Q0 to Q5 are in high-impedance state; Q6

is the toggle bit (see Section 16.9.1).

Figure 24 shows the timing waveform.

P89C738 Datasheet(PDF) 39 Page - NXP Semiconductors

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