Fujitsu MB91460 SERIES FR60 User Manual page 719

■ Function of the Test Register (TESTR)
[bit15-bit8] res
[bit7] Rx
0
1
[bit6-bit5] Tx1-0
00
01
10
11
[bit4] LBack
0
1
[bit3] Silent
0
1
[bit2] Basic
0
1
[bit1-bit0] res
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.
Reserved bits
Monitors the actual value of the CAN_RX Pin
The CAN bus is dominant (CAN_RX = '0').
The CAN bus is recessive (CAN_RX = '1').
Control of CAN_TX pin
Reset value, CAN_TX is controlled by the CAN Core.
Sample Point can be monitored at CAN_TX pin.
CAN_TX pin drives a dominant ('0') value.
CAN_TX pin drives a recessive ('1') value.
Loop Back Mode
Loop Back Mode is disabled.
Loop Back Mode is enabled.
Silent Mode
Normal operation.
The module is in Silent Mode.
Basic Mode
Basic Mode disabled.
IF1 Registers used as Tx Buffer, IF2 Registers used as Rx Buffer.
Reserved Bits
Chapter 34 CAN Controller
2.Register Description
703