Datasheet

202
8246A–AVR–11/09
ATtiny2313A/4313
21.8 Serial Programming Characteristics
Figure 21-6. Serial Programming Timing
Note: 2 t
CLCL
for f
ck
< 12 MHz, 3 t
CLCL
for f
ck
>= 12 MHz
Figure 21-7. Serial Programming Waveform
Table 21-8. Serial Programming Characteristics, T
A
= -40°C to 85°C, V
CC
= 1.8 - 5.5V (Unless
Otherwise Noted)
Symbol Parameter Min Typ Max Units
1/t
CLCL
Oscillator Frequency (ATtiny2313A/4313) 0 4 MHz
t
CLCL
Oscillator Period (ATtiny2313A/4313) 250 ns
1/t
CLCL
Oscillator Frequency (ATtiny2313A/4313, V
CC
=
4.5V - 5.5V)
020MHz
t
CLCL
Oscillator Period (ATtiny2313A/4313, V
CC
=
4.5V - 5.5V)
50 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 100 ns
MOSI
MISO
SCK
t
OVSH
t
SHSL
t
SLSH
t
SHOX
MSB
MSB
LSB
LSB
SERIAL CLOCK INPUT
(SCK)
SERIAL DATA INPUT
(MOSI)
(MISO)
SAMPLE
SERIAL DATA OUTPUT