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AT90S8535 Datasheet(PDF) 93 Page - ATMEL Corporation |
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AT90S8535 Datasheet(HTML) 93 Page - ATMEL Corporation |
93 / 127 page ![]() 93 AT90S/LS8535 1041H–11/01 Parallel Programming This section describes how to parallel program and verify Flash program memory, EEPROM data memory, Lock bits and Fuse bits in the AT90S8535. Signal Names In this section, some pins of the AT90S8535 are referenced by signal names describing their function during parallel programming. See Figure 67 and Table 37. Pins not described in Table 37 are referenced by pin name. The XA1/XA0 pins determine the action executed when the XTAL1 pin is given a posi- tive pulse. The bit coding are shown in Table 38. When pulsing WR or OE, the command loaded determines the action executed. The command is a byte where the different bits are assigned functions as shown in Table 39. Figure 67. Parallel Programming Table 36. Supply Voltage during Programming Part Serial Programming Parallel Programming AT90S8535 4.0 - 6.0V 4.5 - 5.5V AT90LS8535 2.7 - 6.0V 4.5 - 5.5V AT90S8535 VCC +5V RESET GND XTAL1 PD1 PD2 PD3 PD4 PD5 PD6 +12 V RDY/BSY OE BS XA0 XA1 WR PB7 - PB0 DATA |
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