ATMEGA8515-16JI(2010) View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATMEGA8515-16JI
(Rev.:2010)

8-bit Microcontroller with 8K Bytes In-System Programmable Flash

Atmel Corporation 

Parallel Programming

Parameters, Pin

Mapping, and

Commands

Signal Names

This section describes how to parallel program and verify Flash Program memory,

EEPROM Data memory, Memory Lock bits, and Fuse bits in the ATmega8515. Pulses

are assumed to be at least 250 ns unless otherwise noted.

In this section, some pins of the ATmega8515 are referenced by signal names describ-

ing their functionality during parallel programming, see Figure 75 and Table 85. Pins not

described in the following table are referenced by pin names.

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 87.

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

ferent Commands are shown in Table 88.

Figure 75. Parallel Programming

RDY/BSY

OE

WR

BS1

XA0

XA1

PAGEL

+12 V

BS2

PD1

PD2

PD3

PD4

PD5

PD6

PD7

RESET

PA0

XTAL1

GND

VCC

PB7 - PB0

+5V

DATA

Table 85. 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

OE

PD2

I Output Enable (Active low)

WR

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

Bi-directional Data bus (Output

when OE is low)

182 ATmega8515(L)

2512K–AVR–01/10

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