Rainbow-electronics ATmega103L Instrukcja Użytkownika Pobierz pdf (Strona 94)

ATmega603/103

Figure 72. Parallel Programming

Table 38. 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

PD2 I Output Enable (Active low)

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

BS2 PD7 I Byte Select 2 (Always low)

PAGEL PA0 I Program Memory Page Load

DATA PB7-0 I/O Bidirectional Data bus (Output when OE

is low)

Table 39. XA1 and XA0 Coding

XA1 XA0 Action when XTAL1 is Pulsed

0 0 Load Flash or EEPROM Address (High or low address byte determined by BS1)

0 1 Load Data (High or Low data byte for Flash determined by BS1)

1 0 Load Command

1 1 No Action, Idle

ATmega603(L),

ATmega103(L)

VCC

+5V

PA0

GND

XTAL1

PD1

PD2

PD3

PD4

PD5

PD6

PAGEL

RDY/BSY

BS1

XA0

XA1

PB7 - PB0 DATA

RESET+12V

PD7

1 2 ... 89 90 91 92 93 94 95 96 97 98 99 ... 125 126

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Rainbow-electronics ATmega103L Instrukcja Użytkownika Strona 94