Rainbow-electronics ATtiny26L Manual do Utilizador descarregar pdf (Página 109)

109

ATtiny26(L)

1477B–AVR–04/02

Figure 58. Parallel Programming

Note: 1. The pin is used for two different control signals. In the description below, normally

only one of the signals is referred. E.g., “give BS1 a positive pulse” equals “give

PAGEL/BS1 a positive pulse”.

Table 51. Pin Name Mapping

Signal Name in

Programming Mode Pin Name I/O Function

PB0 I Write Pulse (Active low)

XA0 PB1 I XTAL Action Bit 0

XA1/BS2

(1)

PB2 I

XTAL Action Bit 1 multiplexed with Byte Select 2

(“0” selects low byte, “1” selects 2’nd high byte)

PAGEL/BS1

(1)

PB3 I

Program Memory and EEPROM data Page Load

multiplexed with Byte Select 1 (“0” selects low

byte, “1” selects high byte).

PB5 I Output Enable (Active low)

RDY/BSY

PB6 O

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

for new command

DATA PA7:0 I/O Bidirectional Data bus (Output when OE

is low)

Table 52. 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

Prog_enable[0] 0

VCC

+5V

GND

XTAL1/PB4

PB0

PB1

PB2

PB3

PB5

PA7: PA0 DATA

RESET

PB6

+12 V

XA0

RDY/BSY

PAGEL/BS1

XA1/BS2

AVCC

+5V

1 2 ... 104 105 106 107 108 109 110 111 112 113 114 ... 150 151

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