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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ATmega32HVB датащи(PDF) 223 Page - ATMEL Corporation |
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ATmega32HVB датащи(HTML) 223 Page - ATMEL Corporation |
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223 / 273 page  223 8042A–AVR–07/09 ATmega16HVB/32HVB 30.7.9 Programming the Fuse Low Bits The algorithm for programming the Fuse Low bits is as follows (refer to ”Programming the Flash” on page 219 for details on Command and Data loading): 1. A: Load Command “0100 0000”. 2. C: Load Data Low Byte. Bit n = “0” programs and bit n = “1” erases the Fuse bit. 3. Give WR a negative pulse and wait for RDY/BSY to go high. 30.7.10 Programming the Fuse High Bits The algorithm for programming the Fuse High bits is as follows (refer to ”Programming the Flash” on page 219 for details on Command and Data loading): 1. A: Load Command “0100 0000”. 2. C: Load Data Low Byte. Bit n = “0” programs and bit n = “1” erases the Fuse bit. 3. Set BS1 to “1” and BS2 to “0”. This selects high data byte. 4. Give WR a negative pulse and wait for RDY/BSY to go high. 5. Set BS1 to “0”. This selects low data byte. Figure 30-7. Programming the FUSES Waveforms 30.7.11 Programming the Lock Bits The algorithm for programming the Lock bits is as follows (refer to ”Programming the Flash” on page 219 for details on Command and Data loading): 1. A: Load Command “0010 0000”. 2. C: Load Data Low Byte. Bit n = “0” programs the Lock bit. If LB mode 3 is programmed (LB1 and LB2 is programmed), it is not possible to program the Boot Lock bits by any External Programming mode. 3. Give WR a negative pulse and wait for RDY/BSY to go high. The Lock bits can only be cleared by executing Chip Erase. RDY/BSY WR OE RESET +12V PAGEL 0x40 DATA DATA XX XA1 XA0 BS1 XTAL1 AC 0x40 DATA XX AC Write Fuse Low byte Write Fuse high byte 0x40 DATA XX AC Write Extended Fuse byte BS2 |
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