beautypg.com

Spi serial programming characteristics, Atmega162/v – Rainbow Electronics ATmega162V User Manual

Page 248

background image

248

ATmega162/V

2513E–AVR–09/03

Note:

1. a = address high bits, b = address low bits, H = 0 – Low byte, 1 – High Byte, o = data out, i = data in, x = don’t care

SPI Serial Programming
Characteristics

For characteristics of the SPI module, see “SPI Timing Characteristics” on page 267.

Read Fuse High Bits

0101 1000

0000 1000

xxxx xxxx

oooo oooo

Read Fuse high bits. “0” = pro-
grammed, “1” = unprogrammed.
See

Table 100 on page 232

for

details.

Read Extended Fuse Bits

0101 0000

0000 1000

xxxx xxxx

oooo oooo

Read Extended Fuse bits. “0” =
pro-grammed, “1” =
unprogrammed. See

Table 99 on

page 231

for details.

Read Calibration Byte

0011 1000

00xx xxxx

0000 0000

oooo oooo

Read Calibration Byte

Poll RDY/BSY

1111 0000

0000 0000

xxxx xxxx

xxxx xxxo

If o = “1”, a programming operation
is still busy. Wait until this bit
returns to “0” before applying
another command.

Table 111. SPI Serial Programming Instruction Set

(1)

(Continued)

Instruction

Instruction Format

Operation

Byte 1

Byte 2

Byte 3

Byte4