ATA6562/3
• ATA6563: The 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.
1.0
FUNCTIONAL DESCRIPTION
The ATA6562/3 is a stand-alone dual high-speed CAN
transceiver compliant with the ISO 11898-2, ISO
11898-2: 2016, ISO 11898-5 and SAE J2962-2 CAN
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:
1.1
Operating Modes
• ATA6562: The pin 5 is the control input for Silent
mode NSIL, allowing the ATA6562 to only receive
data but 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.
Each of the transceivers supports three operating
modes: Unpowered, Standby and Normal. The
ATA6562 additionally has the 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
ATA6562
ATA6563
VCC < Vuvd(VCC) or
VIO < Vuvd(VIO)
VCC < Vuvd(VCC) or
VIO < Vuvd(VIO)
VCC < Vuvd(VCC)
VCC < Vuvd(VCC)
Unpowered
Mode
Unpowered
Mode
VCC < Vuvd(VCC) or
IO < Vuvd(VIO)
VCC > Vuvd(VCC) or
IO > Vuvd(VIO)
VCC < Vuvd(VCC)
VCC > Vuvd(VCC)
STBY = 1
V
V
STBY = 1
STBY = 1
STBY = 1
Standby
Mode
Standby
Mode
STBY = 0 and
(NSIL = 0 or
TXD = 0)
STBY = 0 and
NSIL = 1 and
TXD = 1 and
Error = 0
STBY = 0 and
TXD = 0
STBY = 0 and
TXD = 1 and
Error = 0
NSIL = 1 and TXD = 1 and Error = 0
NSIL = 0 or Error = 1
TXD = 1 and Error = 0
Error = 1
Silent
Mode
Normal
Mode
Silent
Mode *
Normal
Mode
* Silent Pode is externally not accessible
Note: For the ATA6563 NSIL is internally set to “1”.
TABLE 1-1:
OPERATING MODES
STBY
Inputs
NSIL
Outputs
CAN Driver
Mode
Pin TXD
Pin RXD
Unpowered
Standby
X(3)
X(3)
X(3)
X(3)
X(3)
X(3)
Recessive
Recessive
Recessive
Dominant
Recessive
Recessive
Active(4)
Active(1)
LOW
HIGH
LOW
LOW
LOW
Silent (only for ATA6562)
Normal
LOW
HIGH(2)
HIGH(2)
LOW
HIGH
HIGH
Note 1: LOW if the CAN bus is dominant, 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
DS20005790E-page 4
2017-2021 Microchip Technology Inc. and its subsidiaries