attiny25v ATMEL Corporation, attiny25v Datasheet - Page 165

• Manufacturer Part Number: attiny25v
• Description: Microcontroller With 2/4/8k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

Table 20-16. High-voltage Serial Programming Instruction Set for ATtiny25/45/85 (Continued)
Note:
Notes:
2586K–AVR–01/08
Instruction
Read
Signature
Bytes
Read
Calibration
Byte
Load “No
Operation”
Command
a = address high bits, b = address low bits, d = data in high bits, e = data in low bits, p = data out high bits, q = data out low bits,
x = don’t care, 1 = Lock Bit1, 2 = Lock Bit2, 3 = CKSEL0 Fuse, 4 = CKSEL1 Fuse, 5 = SUT0 Fuse, 6 = SUT1 Fuse, 7 = CKDIV8,
Fuse, 8 = WDTON Fuse, 9 = EESAVE Fuse, A = SPIEN Fuse, B = RSTDISBL Fuse, C = BODLEVEL0 Fuse, D= BODLEVEL1
Fuse, E = MONEN Fuse, F = SPMEN Fuse
1. For page sizes less than 256 words, parts of the address (bbbb_bbbb) will be parts of the page address.
2. For page sizes less than 256 bytes, parts of the address (bbbb_bbbb) will be parts of the page address.
3. The EEPROM is written page-wise. But only the bytes that are loaded into the page are actually written to the EEPROM.
Page-wise EEPROM access is more efficient when multiple bytes are to be written to the same page. Note that auto-erase
of EEPROM is not available in High-voltage Serial Programming, only in SPI Programming.
SDI
SII
SDO
SDI
SII
SDO
SDI
SII
SDO
0_0000_1000_00
0_0100_1100_00
0_0000_1000_00
0_0100_1100_00
0_0000_0000_00
0_0100_1100_00
x_xxxx_xxxx_xx
x_xxxx_xxxx_xx
x_xxxx_xxxx_xx
Instr.1/5
0_0000_00bb_00
0_0000_1100_00
0_0000_0000_00
0_0000_1100_00
x_xxxx_xxxx_xx
x_xxxx_xxxx_xx
Instr.2/6
Instruction Format
0_0000_0000_00
0_0110_1000_00
0_0000_0000_00
0_0111_1000_00
x_xxxx_xxxx_xx
x_xxxx_xxxx_xx
Instr.3
q_qqqq_qqqx_xx
p_pppp_pppx_xx
0_0000_0000_00
0_0110_1100_00
0_0000_0000_00
0_0111_1100_00
Instr.4
ATtiny25/45/85
Operation Remarks
Repeats Instr 2 4 for each
signature byte address.
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