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7630 Datasheet(PDF) 209 Page - Renesas Technology Corp

Part # 7630
Description  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  238 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7630 Datasheet(HTML) 209 Page - Renesas Technology Corp

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7630 Group User’s Manual
3-38
$33(1',;
3.5 List of registers
Fig. 3.5.33 Structure of CAN transmit control register (CTRM)
Fig. 3.5.34 Structure of CAN bus timing control register 1 (CBTCON1)
CAN transmit control register
b7 b6 b5 b4 b3 b2 b1 b0
CAN transmit control register (CTRM) [Address: 003016]
B
Name
Function1
Note 1: R0/R1 denote read access, W0/W1 denote write access.
At reset
R
W
0
Sleep control bit
0: CAN module in normal mode
0
O
O
1: CAN module in sleep mode
1
Reset/configuration control bit
0: CAN module in normal mode
1
O
O
1: CAN module in configuration mode
(plus reset when write)
2
Port double function control bit
0: P31/CTX serves as I/O port
0
O
O
1: P31/CTX serves as CTX output port
3
Transmit request bit
R0: No transmission requested
0
O
O
R1: Transmission requested
W0: No operation
W1: Request transmission
4
Reserved
“0” when read.
0
O
X
5
Transmit buffer control bit
R0: CPU access possible
0
O
O
R1: CPU access not possible
W0: No operation
W1: Lock transmit buffer
6
Reserved
“0” when read.
0
O
X
7
Transmit status bit
0: CAN module idle or receiving
0
O
X
1: CAN module transmitting
CAN bus timing control register 1
b7 b6 b5 b4 b3 b2 b1 b0
CAN bus timing control register 1 (CBTCON1) [Address: 003116]
B
Name
Function
At reset
R
W1
Note 1: Writing to this register is enabled in configuration mode only (refer to section 2.4.4).
0
Prescaler division ratio
selection bits
b3b2b1b0
0
O
O
0000: Divided by 1
1
0001: Divided by 2
0
O
O
0010: Divided by 3
2
…
0
O
O
1101: Divided by 14
3
1110: Divided by 15
0
O
O
1111: Divided by 16
4
Sampling control bit
0: One sample per bit
0
O
O
1: Three samples per bit
5
Propagation time duration
control bits
b7b6b5
0
O
O
000: One time quantum
6
001: Two time quanta
0
O
O
…
7
110: Seven time quanta
0
O
O
111: Eight time quanta



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