Rainbow Electronics ATtiny861_V - Manual (Page 194)

194
2588B–AVR–11/06
ATtiny261/461/861
23.8 Serial Programming Characteristics
Figure 23-7. Serial Programming Waveforms
Figure 23-8. Serial Programming Timing
Note: 1. 2 t
CLCL
for f
ck
< 12 MHz, 3 t
CLCL
for f
ck
>= 12 MHz
Table 23-7. 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 (ATtiny261/461/861V) 0 4 MHz
t
CLCL
Oscillator Period (ATtiny261/461/861V) 250 ns
1/t
CLCL
Oscillator Frequency (ATtiny261/461/861L, VCC =
2.7 - 5.5V)
0 10 MHz
t
CLCL
Oscillator Period (ATtiny261/461/861L, VCC = 2.7 -
5.5V)
100 ns
1/t
CLCL
Oscillator Frequency (ATtiny261/461/861, V
CC
= 4.5V
- 5.5V)
0 20 MHz
t
CLCL
Oscillator Period (ATtiny261/461/861, 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 TBD TBD TBD ns
MSB
MSB
LSB
LSB
SERIAL CLOCK INPUT
(SCK)
SERIAL DATA INPUT
(MOSI)
(MISO)
SAMPLE
SERIAL DATA OUTPUT
MOSI
MISO
SCK
t
OVSH
t
SHSL
t
SLSH
t
SHOX
t
SLIV