M38B53M4-059FP datasheet(167/355 Pages) MITSUBISHI

167 / 355 page

38B5 Group User’s Manual

APPLICATION

2-79

2.3 Serial I/O

q When using the SSTB1 output, regardless of the contents of the SBUSY1 output•SSTB1 output function

selection bit, this transfer interval for each 1-byte data becomes 2 cycles longer than the value

set by the automatic transfer interval set bits of serial I/O1 control register 3.

q When using the combined output of SBUSY1 and SSTB1 as the signal for each of all transfer data

set, the transfer interval after completion of transmission/reception of the last data becomes 2

cycles longer than the value set by the automatic transfer interval set bits.

q Set the transfer interval of each 1-byte data transfer to 5 or more cycles of the internal clock

φ after the rising edge of the last bit of a 1-byte data.

q When selecting an external clock, the set of automatic transfer interval becomes invalid.

s Set of serial I/O1 transfer counter

q Write the value decreased by 1 from the number of transfer data bytes to the serial I/O1 transfer

counter.

q When selecting an external clock, after writing a value to the serial I/O1 register/transfer counter,

wait for 5 or more cycles of internal clock

φ before inputting the transfer clock to the serial I/

O1 clock pin.

s Serial I/O initialization bit

A serial I/O1 automatic transfer interrupt request occurs when “0” is written to the serial I/O

initialization bit during an operation. Disable it with the interrupt enable bit as necessary by program.

M38B53M4-059FP Datasheet(PDF) 167 Page - Mitsubishi Electric Semiconductor