Rainbow-electronics ATmega64M1 Manual do Utilizador descarregar pdf (Página 294)

294

8209A–AVR–08/09

ATmega16M1/32M1/64M1

28.6 Page Size

28.7 Parallel Programming Parameters, Pin Mapping, and Commands

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

Data memory, Memory Lock bits, and Fuse bits in the ATmega16M1/32M1/64M1. Pulses are

assumed to be at least 250 ns unless otherwise noted.

28.7.1 Signal Names

In this section, some pins of the ATmega16M1/32M1/64M1 are referenced by signal names

describing their functionality during parallel programming, see Figure 28-1 and Table 28-11.

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 positive pulse.

The bit coding is shown in Table 28-13.

When pulsing WR

or OE, the command loaded determines the action executed. The different

Commands are shown in Table 28-14.

Table 28-9. No. of Words in a Page and No. of Pages in the Flash

Device Flash Size Page Size PCWORD

No. of

Pages PCPAGE PCMSB

ATmega16M1

8K words

(16K bytes)

64 words

(128 bytes)

PC[5:0] 128 PC[12:6] 12

ATmega32M1

16K words

(32K bytes)

64 words

(128 bytes)

PC[5:0] 256 PC[13:6] 13

ATmega64M1

32K words

(64K bytes)

128 words

(256 bytes)

PC[6:0] 256 PC[14:7] 14

Table 28-10. No. of Words in a Page and No. of Pages in the EEPROM

Device

EEPROM

Size

Page

Size PCWORD

No. of

Pages PCPAGE EEAMSB

ATmega16M1 512 bytes 4 bytes EEA[1:0] 128 EEA[8:2] 9

ATmega32M1 1024 bytes 4 bytes EEA[1:0] 256 EEA[9:2] 9

ATmega64M1 2048 bytes 8 bytes EEA[2:0] 256 EEA[9:2] 9

1 2 ... 289 290 291 292 293 294 295 296 297 298 299 ... 342 343

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