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AT90PWM2 Datasheet(PDF) 283 Page - ATMEL Corporation |
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AT90PWM2 Datasheet(HTML) 283 Page - ATMEL Corporation |
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283 / 361 page  283 4317J–AVR–08/10 AT90PWM2/3/2B/3B Figure 25-1. Parallel Programming Table 25-7. Pin Name Mapping Signal Name in Programming Mode Pin Name I/O Function RDY/BSY PD1 O 0: Device is busy programming, 1: Device is ready for new command OE PD2 I Output Enable (Active low) WR PD3 I Write Pulse (Active low) BS1 PD4 I Byte Select 1 (“0” selects Low byte, “1” selects High byte) XA0 PD5 I XTAL Action Bit 0 XA1 PD6 I XTAL Action Bit 1 PAGEL PD7 I Program memory and EEPROM Data Page Load BS2 PE2 I Byte Select 2 (“0” selects Low byte, “1” selects 2’nd High byte) DATA PB[7:0] I/O Bi-directional Data bus (Output when OE is low) Table 25-8. Pin Values Used to Enter Programming Mode Pin Symbol Value PAGEL Prog_enable[3] 0 XA1 Prog_enable[2] 0 XA0 Prog_enable[1] 0 BS1 Prog_enable[0] 0 VCC GND XTAL1 XA0 RDY/BSY OE RESET + 5V AVCC + 5V PD1 + 12 V PD7 PD6 PD5 PD4 PD3 PD2 PE2 WR XA1 BS2 PAGEL BS1 DATA PB[7:0] |
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