attiny25v ATMEL Corporation, attiny25v Datasheet - Page 174

• Manufacturer Part Number: attiny25v
• Description: Microcontroller With 2/4/8k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

21.8
174
Serial Programming Characteristics
ATtiny25/45/85
Figure 21-4. Serial Programming Waveforms
Figure 21-5. Serial Programming Timing
Table 21-10. Serial Programming Characteristics, T
Note:
Symbol
1/t
1/t
1/t
t
t
t
t
t
t
t
OVSH
SHOX
CLCL
CLCL
CLCL
SHSL
SLSH
CLCL
CLCL
CLCL
SERIAL DATA OUTPUT
SERIAL CLOCK INPUT
SERIAL DATA INPUT
1. 2 t
Parameter
Oscillator Frequency (ATtiny25V/45V/85V)
Oscillator Period (ATtiny25V/45V/85V)
Oscillator Freq. (ATtiny25/45/85, VCC = 2.7 - 5.5V)
Oscillator Period (ATtiny25/45/85, VCC = 2.7 - 5.5V)
Oscillator Freq. (ATtiny25/45/85, V
Oscillator Period (ATtiny25/45/85, V
SCK Pulse Width High
SCK Pulse Width Low
MOSI Setup to SCK High
MOSI Hold after SCK High
CLCL
Otherwise Noted)
SAMPLE
for f
(MOSI)
(MISO)
(SCK)
MOSI
MISO
SCK
ck
< 12 MHz, 3 t
t
OVSH
MSB
MSB
CLCL
for f
t
SHSL
ck
CC
CC
>= 12 MHz
= 4.5V - 5.5V)
= 4.5V - 5.5V)
A
t
SHOX
= -40°C to 85°C, V
2 t
2 t
2 t
t
Min
250
100
CLCL
t
50
CLCL*
CLCL
CLCL
SLSH
0
0
0
*
t
SLIV
CC
Typ
= 1.8 - 5.5V (Unless
LSB
LSB
Max
2586K–AVR–01/08
10
20
4
Units
MHz
MHz
MHz
ns
ns
ns
ns
ns
ns
ns