
181
8183F–AVR–06/12
ATtiny24A/44A/84A
Note:
1. 2 tCLCL for fck < 12 MHz, 3 tCLCL for fck >= 12 MHz
20.9
High-Voltage Serial Programming Characteristics
Figure 20-5.
High-voltage Serial Programming Timing
t
CLCL
Oscillator Period (V
CC = 4.5V - 5.5V)
50
ns
t
SHSL
SCK Pulse Width High
2 t
CLCL
ns
tSLSH
SCK Pulse Width Low
2 tCLCL
ns
t
OVSH
MOSI Setup to SCK High
t
CLCL
ns
tSHOX
MOSI Hold after SCK High
2 tCLCL
ns
Table 20-11. Serial Programming Characteristics, T
A = -40°C to +85°C, VCC = 1.8 - 5.5V
(Unless Otherwise Noted)
Symbol
Parameter
Min
Typ
Max
Units
Table 20-12. High-voltage Serial Programming Characteristics
T
A = 25°C, VCC = 5V (Unless otherwise noted)
Symbol
Parameter
Min
Typ
Max
Units
tSHSL
SCI (PB0) Pulse Width High
125
ns
t
SLSH
SCI (PB0) Pulse Width Low
125
ns
tIVSH
SDI (PA6), SII (PB1) Valid to SCI (PB0) High
50
ns
tSHIX
SDI (PA6), SII (PB1) Hold after SCI (PB0) High
50
ns
t
SHOV
SCI (PB0) High to SDO (PA4) Valid
16
ns
tWLWH_PFB
Wait after Instr. 3 for Write Fuse Bits
2.5
ms
SDI (PA6), SII (PA5)
SDO (PA4)
SCI (PB0)
t
IVSH
t
SHSL
t
SLSH
t
SHIX
t
SHOV