RENESAS TECHNICAL UPDATE TN-RX*-A086A/E

Date: Jan. 30, 2014

Page 13 of 16

Add a chapter in ‘29.12 Usage Notes’.

35.12.14 Note in Relation to Transmit Enable Bit (TE)

When the SCR.TE bit is set to 0 (serial transmission disabled) with a pin functions as TXDn (n = 0 to 3, 12), the pin output

goes high impedance.

To avoid the TXDn line going high impedance, take any of the following methods.

(1) Connect pull-up resistor to the TXDn line.

(2) Before setting the SCR.TE bit to 0, modify the pin function to "general I/O port, output", or, after setting the

SCR.TE bit to 1, modify the pin function to TXDn.

Page 1364

Correct a description in ‘Table 31.8 Operation in CAN Reset Mode and CAN Halt Mode’.

Mode

Receiver

Transmitter

Transmitter

CAN reset mode

(forcible transition)

CANM[1:0] = 11b

CAN module enters CAN reset

mode without waiting for the end of

message reception.

CAN module enters CAN reset

mode without waiting for the end of

message transmission.

CAN module enters CAN reset

mode without waiting for the end of

bus-off recovery.

CAN reset mode

CANM[1:0] = 01b

CAN module enters CAN reset

mode without waiting for the end of

message reception.

CAN module enters CAN reset

mode after waiting for the end of

message transmission.*1,*4

CAN module enters CAN reset

mode without waiting for the end of

bus-off recovery.

CAN halt mode

CAN module enters CAN halt mode

after waiting for the end of message

reception.*2,*3

CAN module enters CAN halt mode

after waiting for the end of message

[When the BOM[1:0] bits are 00b]

A halt request from a program will be

accepted only after bus-off recovery.

[When the BOM[1:0] bits are 01b]

CAN module automatically enters

CAN halt mode without waiting for

the end of bus-off recovery

(regardless of a halt request from a

program).

[When the BOM[1:0] bits are 10b]

CAN module automatically enters

CAN halt mode after waiting for the

end of bus-off recovery (regardless

of a halt request from a program).

[When the BOM[1:0] bits are 11b]

CAN module enters CAN halt mode

(without waiting for the end of busoff

recovery) if a halt is requested by

a program during bus-off.

transmission. In a case that the CAN reset mode is being requested during suspend transmission, mode transition occurs when

the bus is idle, the next transmission ends, or the CAN module becomes a receiver.

does not enter CAN halt mode while the CAN bus is locked in dominant state. Enter CAN reset mode instead.

the CAN module does not enter CAN Halt mode when the CAN bus is locked in dominant state.

Note 4. If a CAN bus error or arbitration-lost occurs during transmission after CAN reset mode or CAN halt mode is requested, the CAN

locked in dominant state.

Page 1251