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FUJITSU MB91460 SERIES FR60 User Manual

Page 719

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703

Chapter 34 CAN Controller

2.Register Description

Function of the Test Register (TESTR)

Write access to the Test Register is enabled by setting bit Test in the CAN Control Register. The different test
functions may be combined, but Tx1-0 /= “00” disturbs message transfer.

[bit15-bit8]

res

Reserved bits

[bit7]

Rx

Monitors the actual value of the CAN_RX Pin

0

The CAN bus is dominant (CAN_RX = ‘0’).

1

The CAN bus is recessive (CAN_RX = ‘1’).

[bit6-bit5]

Tx1-0

Control of CAN_TX pin

00

Reset value, CAN_TX is controlled by the CAN Core.

01

Sample Point can be monitored at CAN_TX pin.

10

CAN_TX pin drives a dominant (‘0’) value.

11

CAN_TX pin drives a recessive (‘1’) value.

[bit4]

LBack

Loop Back Mode

0

Loop Back Mode is disabled.

1

Loop Back Mode is enabled.

[bit3]

Silent

Silent Mode

0

Normal operation.

1

The module is in Silent Mode.

[bit2]

Basic

Basic Mode

0

Basic Mode disabled.

1

IF1 Registers used as Tx Buffer, IF2 Registers used as Rx Buffer.

[bit1-bit0]

res

Reserved Bits