upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 440

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

Symbol 15
CBnRX
Symbol 15
CBnTX
(5)
Remark:
(6)
Remark:
440
CSIBn receive data register (CBnRX)
The CBnRX register is a 16-bit buffer register that holds receive data.
This register is read-only, in 16-bit units.
If reception is enabled, a reception operation is started when the CBnRX register is read.
If the transfer data length is 8 bits, the lower 8 bits of the CBnRX register are read-only in 8-bit
units as the CBnRXL register.
Reset input clears this register to 0000H.
Clearing the CBnPWR bit of the CBnCTL0 register to 0 also initializes this register.
CSIBn transmit data register (CBnTX)
The CBnTX register is a 16-bit buffer register to which transfer data of CSIB is written.
This register can be read or written in 16-bit units.
If transmission is enabled, a transmission operation is started when the CBnTX register is written.
If the transfer data length is 8 bits, the lower 8 bits of the CBnTX register can be read or written in
8-bit units as the CBnTXL register.
Reset input clears this register to 0000H.
n = 0, 1
n = 0, 1
14
14
13
13
Figure 13-7: CSIBn Transmit Data Register (CBnTX) Format
Figure 13-6: CSIBn Receive Data Register (CBnRX) Format
12
12
Address: CB0RX: FFFFFD04H, CB1RX: FFFFFD14H
Address: CB0TX: FFFFFD06H, CB1TX: FFFFFD16H
11
11
Chapter 13 3-Wire Serial Interface (CSIB)
10
10
User’s Manual U16702EE3V2UD00
9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
0
0
R/W After Reset
R/W After Reset
R/W
R
0000H
0000H