Serial Programming Characteristics - Atmel AVR AT90S1200 Manual

Serial Programming
Characteristics
0838H–AVR–03/02
Figure 36. Serial Programming Timing
MOSI
SCK
MISO
Table 20. Serial Programming Characteristics, T
(unless otherwise noted)
Symbol Parameter
1/t Oscillator Frequency (V
CLCL
t Oscillator Period (V
CLCL
1/t Oscillator Frequency (V
CLCL
t Oscillator Period (V
CLCL
t SCK Pulse Width High
SHSL
t SCK Pulse Width Low
SLSH
t MOSI Setup to SCK High
OVSH
t MOSI Hold after SCK High
SHOX
t SCK Low to MISO Valid
SLIV
Table 21. Minimum Wait Delay after the Chip Erase Instruction
Symbol
t
WD_ERASE
Table 22. Minimum Wait Delay after Writing a Flash or EEPROM Location
Symbol
t
WD_PROG
t t
OVSH SHOX
t
SHSL
A
= 2.7 - 4.0V)
CC
= 2.7 - 4.0V)
CC
= 4.0 - 6.0V)
CC
= 4.0 - 6.0V)
CC
3.2V 3.6V
18 ms 14 ms
3.2V 3.6V
9 ms 7 ms
AT90S1200
t
SLSH
t
SLIV
= -40 ° C to 85 ° C, V
= 2.7 - 6.0V
CC
Min Typ Max
0 4.0
250.0
0 12.0
83.3
4.0 t
CLCL
t
CLCL
1.25 t
CLCL
2.5 t
CLCL
10.0 16.0 32.0
4.0V
12 ms
4.0V
6 ms
Units
MHz
ns
MHz
ns
ns
ns
ns
ns
ns
5.0V
8 ms
5.0V
4 ms
47