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ATtiny10/11/12
During programming, the supply voltage must be in accordance with Table 22.
Table 22. Supply Voltage during Programming
Part
Low-voltage Serial Programming
ATtiny10/11L
Not applicable
ATtiny10/11
Not applicable
ATtiny12V
2.2 - 5.5V
ATtiny12L
2.7 - 5.5V
ATtiny12
4.0 - 5.5V
High-voltage Serial Programming
This section describes how to program and verify Flash Program memory, EEPROM Data memory (ATtiny12), lock bits
and fuse bits in the ATtiny10/11/12.
Figure 27. High-voltage Serial Programming
High-voltage Serial Programming Algorithm
To program and verify the ATtiny10/11/12 in the High-voltage Serial Programming mode, the following sequence is recom-
mended (See instruction formats in Table 23):
1. Power-up sequence: Apply 4.5 - 5.5V between V
Toggle PB3 at least four times with minimum 100 ns pulse-width. Set PB3 to "0". Wait at least 100 ns. Apply 12V to
PB5 and wait at least 100 ns before changing PB0. Wait 8 µs before giving any instructions.
2. The Flash array is programmed one byte at a time by supplying first the address, then the low and high data byte.
The write instruction is self-timed, wait until the PB2 (RDY/BSY) pin goes high.
3. The EEPROM array (ATtiny12 only) is programmed one byte at a time by supplying first the address, then the data
byte. The write instruction is self-timed, wait until the PB2 (RDY/BSY) pin goes high.
4. Any memory location can be verified by using the Read instruction which returns the contents at the selected
address at serial output PB2.
5. Power-off sequence: Set PB3 to "0".
Turn V
power off.
CC
When writing or reading serial data to the ATtiny10/11/12, data is clocked on the rising edge of the serial clock, see Figure
28, Figure 29 and Table 24 for details.
ATtiny10/11/12
42
11.5 - 12.5V
SERIAL CLOCK INPUT
Set PB5 to "1".
High-voltage Serial Programming
4.5 - 5.5V
4.5 - 5.5V
4.5 - 5.5V
4.5 - 5.5V
4.5 - 5.5V
4.5 - 5.5V
ATtiny
PB5 (RESET)
VCC
PB3 (XTAL1)
PB2
PB1
GND
PB0
and GND. Set PB5 and PB0 to "0" and wait at least 100 ns.
CC
SERIAL DATA OUTPUT
SERIAL INSTR. INPUT
SERIAL DATA INPUT
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