Manual

103
AT90S/LS8535
1041H–11/01
Serial Programming
Characteristics
Figure 73. Serial Programming Timing
Table 43. Serial Programming Characteristics, T
A
= -40°C to 85°C, V
CC
= 2.7 - 6.0V
(unless otherwise noted)
Symbol Parameter Min Typ Max Units
1/t
CLCL
Oscillator Frequency (V
CC
= 2.7 - 6.0V) 0 4.0 MHz
t
CLCL
Oscillator Period (V
CC
= 2.7 - 4.0V) 250.0 ns
1/t
CLCL
Oscillator Frequency (V
CC
= 4.0 - 6.0V) 0 8.0 MHz
t
CLCL
Oscillator Period (V
CC
= 4.0 - 6.0V) 125.0 ns
t
SHSL
SCK Pulse Width High 2.0 t
CLCL
ns
t
SLSH
SCK Pulse Width Low 2.0 t
CLCL
ns
t
OVSH
MOSI Setup to SCK High t
CLCL
ns
t
SHOX
MOSI Hold after SCK High 2.0 t
CLCL
ns
t
SLIV
SCK Low to MISO Valid 10.0 16.0 32.0 ns
Table 44. Minimum Wait Delay after the Chip Erase instruction
Symbol 3.2V 3.6V 4.0V 5.0V
t
WD_ERASE
18 ms 14 ms 12 ms 8 ms
Table 45. Minimum Wait Delay after Writing a Flash or EEPROM Location
Symbol 3.2V 3.6V 4.0V 5.0V
t
WD_PROG
9 ms 7 ms 6 ms 4 ms
MOSI
MISO
SCK
t
OVSH
t
SHSL
t
SLSH
t
SHOX
t
SLIV