P89C738ABB View Datasheet(PDF) - Philips Electronics
Part Name
Description
MFG CO.
'P89C738ABB' PDF : 64 Pages View PDF
Philips Semiconductors
8-bit Flash microcontrollers
Product specification
P89C738; P89C739
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
th(Vpp)
to(dis)
tACC(DATA)
tE(tot)
tP(tot)
VPP hold time
output disable time; note 2
DATA polling/toggle bit access time
total erase time in auto-chip-erase
total programming time in auto-verify
100
−
−
ns
−
35
−
ns
−
150
−
ns
−
5
−
s
15
−
300
us
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.
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.
1998 Apr 07
39
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