Datasheet

176
2586N–AVR–04/11
ATtiny25/45/85
21.9 High-voltage Serial Programming Characteristics
Figure 21-6. High-voltage Serial Programming Timing
Table 21-12. High-voltage Serial Programming Characteristics T
A
= 25°C ± 10%, V
CC
= 5.0V ±
10% (Unless otherwise noted)
Symbol Parameter Min Typ Max Units
t
SHSL
SCI (PB3) Pulse Width High 125 ns
t
SLSH
SCI (PB3) Pulse Width Low 125 ns
t
IVSH
SDI (PB0), SII (PB1) Valid to SCI (PB3) High 50 ns
t
SHIX
SDI (PB0), SII (PB1) Hold after SCI (PB3) High 50 ns
t
SHOV
SCI (PB3) High to SDO (PB2) Valid 16 ns
t
WLWH_PFB
Wait after Instr. 3 for Write Fuse Bits 2.5 ms
SDI (PB0), SII (PB1)
SDO (PB2)
SCI (PB3)
t
IVSH
t
SHSL
t
SLSH
t
SHIX
t
SHOV