M32C83T datasheet(349/527 Pages) RENESAS

349 / 527 page

Page 326

22. CAN Module

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22.1 CAN-Associated Registers

Figures 22.3 to 22.26 show registers associated with CAN. To access the associated registers, set the

MCD4 to MCD0 bits in the MCD register to "100102" (no division of CPU clock), the PM13 bit in the PM1

22.1.1 CAN0 Control Register 0 (C0CTLR0 Register)

CAN0 Control Register 0

Symbol

Address

After Reset(1)

C0CTLR0

020116 - 020016

XXXX 0000 XX01 0X012

RESET1

TSPRE0

TSRESET

CAN Reset Bit 1

Time Stamp

Counter Reset Bit

0: CAN module reset exited

1: CAN module is reset(2)

RESET0

(b2)

(b5)

(b7 - b6)

(b15 - b12)

LOOPBACK

BASICCAN

CAN Reset Bit 0

Loop Back Mode

Select Bit

Basic CAN Mode

Select Bit

0 0: Selects the CAN bus bit clock

0 1: Selects the CAN bus bit clock divided by 2

1 0: Selects the CAN bus bit clock divided by 3

1 1: Selects the CAN bus bit clock divided by 4

b9 b8

0 : Disables BasicCAN mode function

1 : Enables BasicCAN mode function

0: Disables Loop back function

1: Enables Loop back function

0: CAN module reset exited

1: CAN module is reset(2)

TSPRE1

When this bit is set to "1", the C0TSR

this bit is automatically set to "0".(3)

ECRESET

Error Counter

Reset Bit

When this bit is set to "1", the C0TEC

and C0REC registers are set to "0016".

After that, this bit is automatically set to "0".(3)

Time Stamp

Prescaler Select Bit

Reserved Bit

Set to "0".

Bit Name

Function

Bit

Symbol

Nothing is assigned. When write, set to "0".

When read, its content is indeterminate.

Nothing is assigned. When write, set to "0".

When read, its content is indeterminate.

Nothing is assigned. When write, set to "0".

When read, its content is indeterminate.

NOTES:

1. Value is obtained by setting the SLEEP bit in the C0SLPR register to "1" (sleep mode exited) and

supplying a clock to the CAN module after reset.

2. Set the RESET0 bit and RESET1 bit to the same value simultaneously.

3. This bit can be set to "1" by program, but cannot be set to "0".

b15

Figure 22.3 C0CTLR0 Register

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