Rainbow-electronics ATtiny861_V Manuel d'utilisateur télécharger pdf (Page 172)

172

2588B–AVR–11/06

ATtiny261/461/861

Figure 22-1. Parallel Programming

Table 22-9. Pin Name Mapping

Signal Name in

Programming Mode

Name I/O Function

PB0 I Write Pulse (Active low).

XA0 PB1 I XTAL Action Bit 0

XA1/BS2 PB2 I

XTAL Action Bit 1. Byte Select 2 (“0” selects low byte, “1”

selects 2’nd high byte).

PAGEL/BS1 PB3 I

Byte Select 1 (“0” selects low byte, “1” selects high byte).

Program Memory and EEPROM Data Page Load.

PB5 I Output Enable (Active low).

RDY/BSY PB6 O

0: Device is busy programming, 1: Device is ready for new

command.

DATA I/O PA7-PA0 I/O Bi-directional Data bus (Output when OE

is low).

Table 22-10. Pin Values Used to Enter Programming Mode

Pin Symbol Value

PAGEL/BS1 Prog_enable[3] 0

XA1/BS2 Prog_enable[2] 0

XA0 Prog_enable[1] 0

WR Prog_enable[0] 0

VCC

+5V

GND

AL1/PB4

PB6

PB5

PB0

PB3

PB1

PB2

PA7 - PA0 DATA

RESET

+12 V

PAGEL/BS1

XA0

XA1/BS2

RDY/BSY

AVCC

+5V

1 2 ... 167 168 169 170 171 172 173 174 175 176 177 ... 235 236

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