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ATtiny44 Datasheet(PDF) 173 Page - ATMEL Corporation |
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ATtiny44 Datasheet(HTML) 173 Page - ATMEL Corporation |
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173 / 236 page  173 8006H–AVR–10/09 ATtiny24/44/84 Note: 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 = CKSEL2 Fuse, 6 = CKSEL3 Fuse, 7 = SUT0 Fuse, 8 = SUT1 Fuse, 9 = CKDIV8 Fuse, A = CKOUT Fuse, B = BODLEVEL0 Fuse, C = BODLEVEL1 Fuse, D= BODLEVEL2 Fuse, E = EESAVE Fuse, F = WDTON Fuse, G = SPIEN Fuse, H = DWEN Fuse, I = RSTDISBL Fuse Notes: 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. Write Lock Bits SDI SII SDO 0_0010_0000_00 0_0100_1100_00 x_xxxx_xxxx_xx 0_0000_0021_00 0_0010_1100_00 x_xxxx_xxxx_xx 0_0000_0000_00 0_0110_0100_00 x_xxxx_xxxx_xx 0_0000_0000_00 0_0110_1100_00 x_xxxx_xxxx_xx Wait after Instr. 4 until SDO goes high. Write 2 - 1 = “0” to program the Lock Bit. Read Fuse Low Bits SDI SII SDO 0_0000_0100_00 0_0100_1100_00 x_xxxx_xxxx_xx 0_0000_0000_00 0_0110_1000_00 x_xxxx_xxxx_xx 0_0000_0000_00 0_0110_1100_00 A_9876_543x_xx Reading A - 3 = “0” means the Fuse bit is programmed. Read Fuse High Bits SDI SII SDO 0_0000_0100_00 0_0100_1100_00 x_xxxx_xxxx_xx 0_0000_0000_00 0_0111_1010_00 x_xxxx_xxxx_xx 0_0000_0000_00 0_0111_1100_00 I_HGFE_DCBx_xx Reading F - B = “0” means the Fuse bit is programmed. Read Fuse Extended Bits SDI SII SDO 0_0000_0100_00 0_0100_1100_00 x_xxxx_xxxx_xx 0_0000_0000_00 0_0110_1010_00 x_xxxx_xxxx_xx 0_0000_0000_00 0_0110_1110_00 x_xxxx_xxJx_xx Reading J = “0” means the Fuse bit is programmed. Read Lock Bits SDI SII SDO 0_0000_0100_00 0_0100_1100_00 x_xxxx_xxxx_xx 0_0000_0000_00 0_0111_1000_00 x_xxxx_xxxx_xx 0_0000_0000_00 0_0110_1100_00 x_xxxx_x21x_xx Reading 2, 1 = “0” means the Lock bit is programmed. Read Signature Bytes SDI SII SDO 0_0000_1000_00 0_0100_1100_00 x_xxxx_xxxx_xx 0_0000_00bb_00 0_0000_1100_00 x_xxxx_xxxx_xx 0_0000_0000_00 0_0110_1000_00 x_xxxx_xxxx_xx 0_0000_0000_00 0_0110_1100_00 q_qqqq_qqqx_xx Repeats Instr 2 4 for each signature byte address. Read Calibration Byte SDI SII SDO 0_0000_1000_00 0_0100_1100_00 x_xxxx_xxxx_xx 0_0000_0000_00 0_0000_1100_00 x_xxxx_xxxx_xx 0_0000_0000_00 0_0111_1000_00 x_xxxx_xxxx_xx 0_0000_0000_00 0_0111_1100_00 p_pppp_pppx_xx Load “No Operation” Command SDI SII SDO 0_0000_0000_00 0_0100_1100_00 x_xxxx_xxxx_xx Table 19-16. High-voltage Serial Programming Instruction Set for ATtiny24/44/84 (Continued) Instruction Instruction Format Operation Remarks Instr.1/5 Instr.2/6 Instr.3/7 Instr.4 |
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