upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 434

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

13.4 Control Registers Description
(1)
Remark:
Note: This register can be rewritten only when the CBnPWR bit = 0. However, the CBnPWR bit can
434
CBnCTL0 CBnPWR CBnTXE
The CBnPWR bit controls the operating clock of CSIB and resets the internal circuit.
When the CBnTXE bit is cleared to 0, the serial output pin SOBn is fixed to the low level and communication is
stopped.
When the CBnRXE bit is cleared to 0, because reception is stopped, the reception complete interrupt is not out-
put and the receive data in the CBnRX register is not updated even if the specified data is transferred.
CBnTXE
CBnRXE
Symbol
CBnDIR
CBnPWR
CSIBn control register 0 (CBnCTL0)
This register controls the serial transfer operation of CSIB.
This register can be read or written in 8-bit or 1-bit units.
Reset input sets this register to 01H.
0
1
0
1
0
1
0
1
also be set to 1 at the same time as rewriting these bits.
Note
Note
Note
n = 0, 1
7
Stop clock operation (asynchronously reset CSIBn).
Enable clock operation.
Stop transmission.
Enable transmission.
Stop reception.
Enable reception.
Figure 13-2: CSIBn Control Register 0 (CBnCTL0) Format (1/2)
Address: CB0CTL0: FFFFFD00H, CB1CTL0: FFFFFD10H
6
Note
Chapter 13 3-Wire Serial Interface (CSIB)
CBnRXE
Specification of transmission operation stop or enable
Specification of transfer direction mode (MSB/LSB)
User’s Manual U16702EE3V2UD00
5
Specification of CSIB operation stop or enable
Note
CBnDIR
Reception operation enable
4
Note
MSB first
LSB first
3
0
2
0
CBnTMS
1
Note
CBnSCE
0
R/W
R/W 01H
Reset
After