Datasheet

257
ATtiny828 [DATASHEET]
8371A–AVR–08/12
24.11 Serial Programming Characteristics
Figure 107. Serial Programming Timing
Figure 108. Serial Programming Waveform
Table 115. Serial Programming Characteristics, T = -40°C to +85°C, VCC = 1.7 – 5.5V (Unless Otherwise
Noted)
Note: 1. 2 t
CLCL
for f
ck
< 12MHz, 3 t
CLCL
for f
ck
>= 12 MHz
Symbol Parameter Min Typ Max Units
1/t
CLCL
Oscillator Frequency 0 4 MHz
t
CLCL
Oscillator Period 250 ns
1/t
CLCL
Oscillator Freq. (V
CC
= 4.5V - 5.5V) 0 20 MHz
t
CLCL
Oscillator Period (V
CC
= 4.5V - 5.5V) 50 ns
t
SHSL
SCK Pulse Width High 2 t
CLCL
(1)
ns
t
SLSH
SCK Pulse Width Low 2 t
CLCL
(1)
ns
t
OVSH
MOSI Setup to SCK High t
CLCL
ns
t
SHOX
MOSI Hold after SCK High 2 t
CLCL
ns
M
OSI
M
ISO
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