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AT90CAN64 Datasheet(PDF) 36 Page - ATMEL Corporation

Part # AT90CAN64
Description  Non volatile Program and Data Memories
PDF  428 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90CAN64 Datasheet(HTML) 36 Page - ATMEL Corporation

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36
7679H–CAN–08/08
AT90CAN32/64/128
4.6
General Purpose I/O Registers
The AT90CAN32/64/128 contains three General Purpose I/O Registers. These registers can be
used for storing any information, and they are particularly useful for storing global variables and
status flags.
The General Purpose I/O Register 0, within the address range 0x00 - 0x1F, is directly bit-acces-
sible using the SBI, CBI, SBIS, and SBIC instructions.
4.6.1
General Purpose I/O Register 0 – GPIOR0
4.6.2
General Purpose I/O Register 1 – GPIOR1
4.6.3
General Purpose I/O Register 2 – GPIOR2
Bit
765
4321
0
GPIOR07 GPIOR06 GPIOR05 GPIOR04 GPIOR03 GPIOR02 GPIOR01 GPIOR00
GPIOR0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
000
0000
0
Bit
765
4321
0
GPIOR17 GPIOR16 GPIOR15 GPIOR14 GPIOR13 GPIOR12 GPIOR11 GPIOR10
GPIOR1
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
000
0000
0
Bit
765
4321
0
GPIOR27 GPIOR26 GPIOR25 GPIOR24 GPIOR23 GPIOR22 GPIOR21 GPIOR20
GPIOR2
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
000
0000
0



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