Rainbow-electronics ATmega64L Bedienungsanleitung PDF herunterladen (Seite 256)

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ATmega16(L)

2466B–09/01

The XA1/XA0 pins determine the action executed when the XTAL1 pin is given a posi-

tive pulse. The bit coding is shown in Table 109.

When pulsing WR or OE, the command loaded determines the action executed. The dif-

ferent Commands are shown in Table 110.

Figure 128. Parallel Programming

Table 107. 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

PAGEL PD7 I Program Memory and EEPROM data Page Load

BS2 PA0 I

Byte Select 2 ("0" selects low byte, "1" selects 2"nd

high byte)

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

is low)

VCC

+5V

GND

XTAL1

PD1

PD2

PD3

PD4

PD5

PD6

PB7 - PB0 DATA

RESET

PD7

+12 V

BS1

XA0

XA1

RDY/BSY

PAGEL

PA0

BS2

1 2 ... 251 252 253 254 255 256 257 258 259 260 261 ... 297 298

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