Rainbow Electronics ATmega161L - Manual (Page 129)

129
ATmega161(L)
1228C–AVR–08/02
Serial Programming
Characteristics Figure 81. Serial Programming Timing
Table 49. Serial Programming Characteristics, T
A
= -40
°C to 85°C, V
CC
= 2.7 - 5.5V
(unless otherwise noted)
Symbol Parameter Min Typ Max Units
1/t
CLCL
Oscillator Frequency (V
CC
= 2.7 - 5.5V ) 0 4 MHz
(V
CC
= 4.0 - 5.5V ) 0 8 MHz
t
CLCL
Oscillator Period (V
CC
= 2.7 - 5.5V ) 250 ns
(V
CC
= 4.0 - 5.5V ) 125 ns
t
SHSL
SCK Pulse Width High 2 t
CLCL
ns
t
SLSH
SCK Pulse Width Low 2 t
CLCL
ns
t
OVSH
MOSI Setup to SCK High t
CLCL
ns
t
SHOX
MOSI Hold after SCK High 2 t
CLCL
ns
t
SLIV
SCK Low to MISO Valid 10 16 32 ns
MOSI
MISO
SCK
t
OVSH
t
SHSL
t
SLSH
t
SHOX
t
SLIV