AT90CAN128-15MZ View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT90CAN128-15MZ

8-bit Microcontroller with 32K/64K/128K Bytes of ISP Flash and CAN Controller

Atmel Corporation 

Port F also serves as an 8-bit bi-directional I/O port, if the A/D Converter is not used. Port pins

can provide internal pull-up resistors (selected for each bit). The Port F output buffers have sym-

metrical drive characteristics with both high sink and source capability. As inputs, Port F pins

that are externally pulled low will source current if the pull-up resistors are activated. The Port F

pins are tri-stated when a reset condition becomes active, even if the clock is not running.

Port F also serves the functions of the JTAG interface. If the JTAG interface is enabled, the pull-

up resistors on pins PF7(TDI), PF5(TMS), and PF4(TCK) will be activated even if a reset occurs.

1.7.9

Port G (PG4..PG0)

Port G is a 5-bit I/O port with internal pull-up resistors (selected for each bit). The Port G output

buffers have symmetrical drive characteristics with both high sink and source capability. As

inputs, Port G pins that are externally pulled low will source current if the pull-up resistors are

activated. The Port G pins are tri-stated when a reset condition becomes active, even if the clock

is not running.

Port G also serves the functions of various special features of the AT90CAN32/64/128 as listed

on page 88.

1.7.10 RESET

Reset input. A low level on this pin for longer than the minimum pulse length will generate a

reset. The minimum pulse length is given in characteristics. Shorter pulses are not guaranteed

to generate a reset. The I/O ports of the AVR are immediately reset to their initial state even if

the clock is not running. The clock is needed to reset the rest of the AT90CAN32/64/128.

1.7.11 XTAL1

Input to the inverting Oscillator amplifier and input to the internal clock operating circuit.

1.7.12 XTAL2

Output from the inverting Oscillator amplifier.

1.7.13 AVCC

AVCC is the supply voltage pin for the A/D Converter on Port F. It should be externally con-

nected to VCC, even if the ADC is not used. If the ADC is used, it should be connected to VCC

through a low-pass filter.

1.7.14 AREF

This is the analog reference pin for the A/D Converter.

2. About Code Examples

This documentation contains simple code examples that briefly show how to use various parts of

the device. These code examples assume that the part specific header file is included before

compilation. Be aware that not all C compiler vendors include bit definitions in the header files

and interrupt handling in C is compiler dependent. Please confirm with the C compiler documen-

tation for more details.

8 AT90CAN32/64/128

7682C–AUTO–04/08

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