upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 455

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

(3)
Notes: 1. Set the CBnSCE bit to 1 at the initial setting
Caution:
Single Transmission/reception
2. If the transfer is reception only, write dummy data to the CBnTX register.
Even in single mode, the CBnOVE flag (CBnSTR register) is set to 1. If only transmis-
sion is used in the transmission/reception mode, there is no need to check this flag.
Figure 13-19: Single Transmission/Reception Flow (Master)
Chapter 13 3-Wire Serial Interface (CSIB)
User’s Manual U16702EE3V2UD00
Transmission only
CBnCTL0
CBnTXE=CBnRXE=0
(=> start transfer)
CBnPWR = 0,
Write CBnTX
INTCBnR = 1?
Initial settings
CBnRX read
Transfer end?
(CBnCTL0)
Note 1
START
END
/CBnCTL1, etc.
Yes
Transmission/reception
or reception only
Yes
Note 2
No
No
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