ATA6560 datasheet(4/28 Pages) MICROCHIP

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ATA6560/1

DS20005991A-page 4

 2018 Microchip Technology Inc.

1.0

FUNCTIONAL DESCRIPTION

The ATA6560/1 is a stand-alone, high-speed CAN

transceiver, compliant with the ISO 11898-2 and

ISO 11898-5 standards. It provides a very low current

consumption in Standby mode and wake-up capability

via the CAN bus. There are two versions available, only

differing in the function of pin 5:

• ATA6560: Pin 5 is the control input for Silent mode

NSIL, allowing the ATA6560 to only receive data

and not send data via the bus. The output driver

stage is disabled. The VIO line and the VCC line

are internally connected; this sets the signal levels

of the TXD, RXD, STBY, and NSIL pins to levels

compatible with 5V microcontrollers.

• ATA6561: Pin 5 is the VIO pin and should be

connected to the microcontroller supply voltage.

This allows direct interfacing to microcontrollers

with supply voltages down to 3V and adjusts the

signal levels of the TXD, RXD, and STBY pins to

the I/O levels of the microcontroller. The I/O ports

are supplied by the VIO pin.

1.1

Operating Modes

The ATA6561 supports three operating modes: Unpow-

ered, Standby, and Normal. The ATA6560 has an addi-

tional Silent mode. These modes can be selected via

the STBY and NSIL pin. See Figure 1-1 and Table 1-1

for a description of the operating modes.

FIGURE 1-1:

Operating Modes.

TABLE 1-1:

OPERATING MODES

Mode

Inputs

Outputs

STBY

NSIL

TXD

CAN Driver

RXD

Unpowered

X(3)

Recessive

Standby

HIGH

X(3)

Recessive

Active(4)

Silent (only for ATA6560)

LOW

X(3)

Recessive

Active(1)

Normal

LOW

HIGH(2)

LOW

Dominant

LOW

HIGH(2)

HIGH

Recessive

HIGH

Note 1: LOW if the CAN bus is dominant, and HIGH if the CAN bus is recessive.

2: Internally pulled up if not bonded out.

3: Irrelevant.

4: Reflects the bus only for wake-up.

VCC < Vuvd(VCC)

STBY = 1

STBY = 0 and

NSIL = 1 and

STBY = 0 and

(NSIL = 0 or

TXD = 0)

STBY = 0 and

TXD = 0

NSIL = 1 and

TXD = 1 and

Error = 0

NSIL = 0 or

Error = 1

TXD = 1 and

Error = 0

VCC > Vuvd(VCC)

VCC < Vuvd(VCC)

Unpowered

Mode

Standby

Mode

Silent

Mode

Normal

Mode

VCC < Vuvd(VCC) or

STBY = 1

STBY = 0 and

TXD = 1 and

Error = 0 and

TXD = 1

Error = 1

Error = 0

VCC < Vuvd(VCC) or

VIO < Vuvd(VIO)

VCC < Vuvd(VCC) or

VCC > Vuvd(VCC) and

VIO < Vuvd(VIO)

VIO > Vuvd(VIO)

Unpowered

Mode

Standby

Mode

Silent

Mode

Normal

Mode

ATA6560

ATA6561

STBY = 1

Note 1: The Silent mode is externally not accessible.

2: For the ATA6561, NSIL is internally set to “1”.

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