ATA6602 Ver la hoja de datos (PDF) - Atmel Corporation

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ATA6602

Microcontroller with LIN Transceiver, 5V Regulator and Watchdog

Atmel Corporation 

ATA6602/ATA6603

4.2.4.4

4.2.4.5

4.2.4.6

4.2.4.7

4.2.4.8

4.2.4.9

Port C (PC5:0)

Port C is a 7-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The

PC5..0 output buffers have symmetrical drive characteristics with both high sink and source

capability. As inputs, Port C pins that are externally pulled low will source current if the pull-up

resistors are activated. The Port C pins are tri-stated when a reset condition becomes active,

even if the clock is not running.

PC6/RESET

If the RSTDISBL Fuse is unprogrammed, PC6 is used as a Reset input. A low level on this pin

for longer than the minimum pulse length will generate a Reset, even if the clock is not running.

The minimum pulse length is given in Table 4-3 on page 44. Shorter pulses are not guaranteed

to generate a Reset.

The various special features of Port C are elaborated in “Alternate Functions of Port C” on page

98.

Port D (PD7:0)

Port D is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The

Port D output buffers have symmetrical drive characteristics with both high sink and source

capability. As inputs, Port D pins that are externally pulled low will source current if the pull-up

resistors are activated. The Port D pins are tri-stated when a reset condition becomes active,

even if the clock is not running.

The various special features of Port D are elaborated in “Alternate Functions of Port D” on page

101.

AVCC

AREF

AVCC is the supply voltage pin for the A/D converter, PC3:0, and ADC7:6. I should be externally

connected 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. Note that PC6..4 use digital supply voltage, VCC.

AREF is the analog reference pin for the A/D converter.

ADC7:6 (TQFP and QFN/MLF Package Only)

In the TQFP and QFN/MLF package, ADC7:6 serve as analog inputs to the A/D converter.

These pins are powered from the analog supply and serve as 10-bit ADC channels.

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4921C–AUTO–01/07

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