ATTINY12 ATMEL Corporation, ATTINY12 Datasheet - Page 52

• Manufacturer Part Number: ATTINY12
• Description: 8-bit AVR Microcontroller with 1K Byte Flash
• Manufacturer: ATMEL Corporation

High-voltage Serial
Programming
Characteristics
Low-voltage Serial
Downloading (ATtiny12
only)
52
ATtiny11/12
Figure 29. High-voltage Serial Programming Timing
Table 24. High-voltage Serial Programming Characteristics T
5.0V ± 10% (Unless otherwise noted)
Both the program and data memory arrays can be programmed using the SPI bus while
RESET is pulled to GND. The serial interface consists of pins SCK, MOSI (input) and
MISO (output), see Figure 30. After RESET is set low, the Programming Enable instruc-
tion needs to be executed first before program/erase instructions can be executed.
Figure 30. Serial Programming and Verify
t
WLWH_PFB
Symbol
t
t
t
t
t
SHOV
SHSL
SLSH
IVSH
SHIX
Parameter
SCI (PB3) Pulse Width High
SCI (PB3) Pulse Width Low
SDI (PB0), SII (PB1) Valid to SCI (PB3) High
SDI (PB0), SII (PB1) Hold after SCI (PB3) High
SCI (PB3) High to SDO (PB2) Valid
Wait after Instr. 3 for Write Fuse Bits
GND
SDI (PB0), SII (PB1)
SDO (PB2)
SCI (PB3)
GND
PB5 (RESET)
t
IVSH
ATtiny12
t
SHSL
t
SHOV
VCC
PB2
PB1
PB0
t
SHIX
2.2 - 5.5V
Min
100
100
1.7
50
50
10
t
SLSH
A
SCK
MISO
MOSI
= 25 C ± 10%, V
Typ
2.5
16
Max
1006D–AVR–07/03
3.4
32
Units
ms
ns
ns
ns
ns
ns
CC
=