AT89S51-24 ATMEL [ATMEL Corporation], AT89S51-24 Datasheet - Page 19

• Manufacturer Part Number: AT89S51-24
• Description: 8-bit Microcontroller with 4K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

2487A–10/01
Serial Programming Characteristics
Figure 9. Serial Programming Timing
Table 9. Serial Programming Characteristics, T
Symbol
1/t
t
t
t
t
t
t
t
t
CLCL
SHSL
SLSH
OVSH
SHOX
SLIV
ERASE
SWC
CLCL
Parameter
Oscillator Frequency
Oscillator Period
SCK Pulse Width High
SCK Pulse Width Low
MOSI Setup to SCK High
MOSI Hold after SCK High
SCK Low to MISO Valid
Chip Erase Instruction Cycle Time
Serial Byte Write Cycle Time
MOSI
MISO
SCK
t
OVSH
A
= -40 C to 85 C, V
t
SHSL
8 t
2 t
8 t
t
Min
CLCL
30
10
CLCL
CLCL
CLCL
0
t
SHOX
CC
= 4.0 - 5.5V (Unless Otherwise Noted)
t
SLSH
Typ
16
t
SLIV
64 t
CLCL
Max
500
33
32
+ 400
AT89S51
Units
MHz
ms
ns
ns
ns
ns
ns
ns
µs
19