CHAPTER 10 SERIAL INTERFACE FUNCTION
User’s Manual U15195EJ5V0UD
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10.4.3 Control registers
Because CSI1 shares its pins with UART1, the CSI1 mode must be preset by using the PMC3 and RFC3 registers
(refer to
10.1.1 Selecting mode of UART1 or CSI1
).
(1) Clocked serial interface mode registers 0, 1 (CSIM0, CSIM1)
The CSIMn register controls the CSIn operation (n = 0, 1).
These registers can be read/written in 8-bit or 1-bit units (however, bit 0 is read-only).
Caution Overwriting the TRMDn, CCL, DIRn, CSIT, and AUTO bits of the CSIMn register can be done
only when the CSOTn bit = 0. If these bits are overwritten at any other time, the operation
cannot be guaranteed.