336CHAPTER 16 SERIAL INTERFACE CHANNEL 0 (μPD78058F SUBSERIES)To InternalCircuitSCK0/P27 P27 OutputLatchWhen CSIE0 = 1andCSIM01 and CSIM00 are 1 and 0, or 1 and 1.SCK0 (1 while transfer is stopped)From Serial ClockControl CircuitManipulated by bitmanipulation instruction16.4.5 SCK0/P27 pin output manipulationBecause the SCK0/P27 pin incorporates an output latch, static output is also possible by software in addition tonormal serial clock output.P27 output latch manipulation enables any value of SCK0 to be set by software. (SI0/SB0 and SO0/SB1 pin tobe controlled with the RELT and CMDT bits of serial bus interface control register (SBIC).)SCK0/P27 pin output manipulating procedure is described below.<1> Set the serial operating mode register 0 (CSIM0) (SCK0 pin enabled for serial operation in the output mode).SCK0 = 1 with serial transfer suspended.<2> Manipulate the P27 output latch with a bit manipulation instruction.Figure 16-34. SCK0/P27 Pin Configuration
