Rainbow Electronics ATtiny43U - Manual (Page 164)

164
8048B–AVR–03/09
ATtiny43U
20.10 Serial Programming Characteristics
Figure 20-6. Serial Programming Timing
Figure 20-7. Serial Programming Waveforms
Table 20-11. 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 0 4 MHz
t
CLCL
Oscillator Period 250 ns
1/t
CLCL
Oscillator Frequency (V
CC
= 4.5V - 5.5V) 0 8 MHz
t
CLCL
Oscillator Period (V
CC
= 4.5V - 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 TBD TBD TBD ns
MOSI
MISO
SCK
t
OVSH
t
SHSL
t
SLSH
t
SHOX
t
SLIV
MSB
MSB
LSB
LSB
SERIAL CLOCK INPUT
(SCK)
SERIAL DATA INPUT
(MOSI)
(MISO)
SAMPLE
SERIAL DATA OUTPUT