p89c538nbb NXP Semiconductors, p89c538nbb Datasheet - Page 28

• Manufacturer Part Number: p89c538nbb
• Description: Cmos Single-chip 8-bit Microcontrollers With Flash Program Memory
• Manufacturer: NXP Semiconductors

Philips Semiconductors
A
All data in the FLASH memory is erased. External erase verification
is not required. Erasure completion can be verified by DATA polling
and toggle bit checking after automatic erase starts. Device outputs
0 during erasure and 1 after erasure on Q7, Q0 to Q5 (Q6 is for
toggle bit; see toggle bit, DATA polling, timing waveform) are in high
impedance.
RESET
1998 Apr 24
UTOMATIC
80C51 8-bit microcontroller family
16K/64K/512 FLASH
Q0–Q5
V
A0–A15
V
CC
V
A0–A15
PP
V
Q0–Q7
12V
CC
PP
WE
CE
Q7
OE
OV
5V
C
12V
CE
WE
OE
0V
5V
HIP
E
RASE
QES
VPS
QES
VPS
CEP
COMMAND IN
DS
CEP
COMMAND IN
COMMAND IN
CWC
DS
FFH
SETUP AUTO CHIP ERASE/
ERASE COMMAND
t
CWC
Figure 23.
CEPH
CEPH1
DH
1
DH
Figure 24.
CEP
DS
Automatic Chip Erase Timing Waveform
COMMAND IN
COMMAND IN
CEP
COMMAND IN
DS
CESP
FFH
DH
Reset Timing Waveform
AUTO CHIP ERASE & DATA POLLING
DH
28
CES
AETC
DPA
DATA POLLING
CESC
VPH
DF
SU00878
89C536/89C538
Preliminary specification
SU00879