M38B53M4-059FP datasheet(127/355 Pages) MITSUBISHI

127 / 355 page

38B5 Group User’s Manual

APPLICATION

2-39

2.3 Serial I/O

Fig. 2.3.5 Structure of Serial I/O1 register/Transfer counter

•In 8-bit serial I/O

mode:

Serial I/O1 register

•In automatic transfer

serial I/O mode:

Transfer counter

Serial I/O1 register/Transfer counter

b7 b6 b5 b4 b3 b2 b1 b0

Serial I/O1 register/Transfer counter

(SIO1: address 1B16)

Name

Undefined

Functions

At reset R W

Undefined

•At function as serial I/O1

This register becomes the

shift register to perform

serial transmit/reception.

Set transmit data to this

The serial transfer is started

by writing the transmit data.

•At function as transfer

counter:

Set (transfer byte number –

1) to this register.

When selecting an internal

clock, the automatic

transfer is started by writing

the transmit data.

(When selecting an external

clock, after writing a value

to this register, wait for 5 or

more cycles of the internal

system clock before

inputting the transfer clock

to the SCLK1 pin.)

M38B53M4-059FP Datasheet(PDF) 127 Page - Mitsubishi Electric Semiconductor

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