7630 datasheet(217/238 Pages) RENESAS

217 / 238 page

7630 Group User’s Manual

3-46

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3.5 List of registers

Fig. 3.5.49 Structure of CAN transmit/receive buffer registers 1 (CTB1/CRB1)

Fig. 3.5.50 Structure of CAN transmit/receive buffer registers 2 (CTB2/CRB2)

CAN transmit/receive buffer registers 1

b7 b6 b5 b4 b3 b2 b1 b0

CAN transmit buffer register 1 (CTB1) [Address: 004116]

CAN receive buffer register 1 (CRB1) [Address: 005116]

Name

Function

At reset

IDE bit1

Note 1: Identifier extension bit

0: Standard format

1: Extended format

RTR2/SRR3 bit

Note 2: Remote transmission request bit

Note 3: Substitute remote request bit

RTR bit (frames of standard format) or

SRR bit (frames of extended format)

Standard identifier bit 0

For CTB1: These bits represent part of

the identifier field of a frame to be

transmitted.

For CRB1: These bits represent part of

the identifier field of a frame received.

Standard identifier bit 1

Standard identifier bit 2

Standard identifier bit 3

Standard identifier bit 4

Standard identifier bit 5

CAN transmit/receive buffer registers 2

b7 b6 b5 b4 b3 b2 b1 b0

CAN transmit buffer register 2 (CTB2) [Address: 004216]

CAN receive buffer register 2 (CRB2) [Address: 005216]

Name

Function

At reset

Extended identifier bit 14

For CTB2: These bits represent part of

the identifier field of a frame to be

transmitted.

For CRB2: These bits represent part of

the identifier field of a frame received.

Extended identifier bit 15

Extended identifier bit 16

Extended identifier bit 17

Not used

When these bits are read out, the values

are "0". Don’t write to "1".

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