Datasheet

44
3286P–MICRO–3/10
AT89S8253
Notes: 1. Power On occurs once V
CC
reaches 2.4V.
2. 9 ms if Chip Erase.
26. Flash Programming and Verification Characteristics – Parallel Mode
T
A
= 20°C to 30°C, V
CC
= 4.0V to 5.5V
Symbol Parameter
Min Max Units
V
PP
Programming Enable Voltage 11.5 12.5 V
I
PP
Programming Enable Current 1.0 mA
1/t
CLCL
Oscillator Frequency 3 24 MHz
t
PWRUP
Power On to RST High
(1)
10 µs
t
RHX
RST High to XTAL Start 10 µs
t
OSTL
Oscillator Settling Time 10 ms
t
HSTL
High Voltage Settling Time 10 µs
t
MSTP
Mode Setup to PROG Low 1 µs
t
ASTP
Address Setup to PROG Low 1 µs
t
DSTP
Data Setup to PROG Low 1 µs
t
PGW
PROG Width 1 µs
t
AHLD
Address Hold after PROG 1µs
t
DHLD
Data Hold after PROG 1µs
t
BLT
Byte Load Period 1 150 µs
t
PHBL
PROG High to BUSY Low 256 µs
t
WC
Write Cycle Time
(2)
4.5 ms
t
MHLD
Mode Hold After BUSY Low 10 µs
t
VFY
Address to Data Verify Valid 1 µs
t
PSTP
PROG Setup to V
PP
High 10 µs
t
PHLD
PROG Hold after V
PP
Low 10 µs
t
PLX
PROG Low to XTAL Halt 1 µs
t
XRL
XTAL Halt to RST Low 1 µs
t
PWRDN
RST Low to Power Off 1 µs