Transfer Data Length Change Function - NEC V850E/RS1 User Manual

13.5 Transfer Data Length Change Function

The transfer data length of CSIB can be changed from 8 to 16 bits in 1-bit units by using the CBnCL3 to
CBnCL0 bits of the CBnCTL2 register.
If a transfer data length of other than 16 bits is specified, set data in the CBnTX or CBnRX register, jus-
tifying to the least significant bit, regardless of whether the first transfer bit is the MSB or LSB. Any data
can be set to the higher bits that are not used, but the receive data is 0 after serial transfer.
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Chapter 13 3-Wire Serial Interface (CSIB)
Figure 13-8: Changing Transfer Data Length
(a) When transfer bit length = 10 bits, MSB first
SOBn
15 10
(b) When transfer bit length = 12 bits, LSB first
SIBn
15 12 11
Insert 0
User's Manual U16702EE3V2UD00
9
Insert 0
SIBn
0
SOBn
0
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