M38B53M4-059FP datasheet(142/355 Pages) MITSUBISHI

142 / 355 page

2-54

38B5 Group User’s Manual

APPLICATION

2.3 Serial I/O

Automatic transfer serial I/O (8 bits)

SIO1CON1

(SC11)

Serial I/O1 control register 1 (address 001916)

0 0 0 0 0 1 1

Internal synchronous clock (P65 pin is an I/O port.)

Serial I/O initialization

LSB first

Full duplex mode

Pins P62 and P64 of I/O ports

SIO1CON2

(SC12)

Serial I/O1 control register 2 (address 001A16)

0 0 0 0

P51/SOUT1: CMOS 3-state

SOUT1 pin: Output active

Automatic transfer interval set bits: 32 cycles of transfer clock

SIO1CON3

(SC13)

Serial I/O1 control register 3 (address 001C16)

1 1 1 1 1 1 0

Internal synchronous clock: f(XIN)/32

SIO1DP

Serial I/O1 automatic transfer data pointer (address 001816)

Set low-order 8 bits of address 0F0716 (=0716)

0716

SIO1

Transfer counter (address 001B16)

DO7

DO6

DO1

DO0

0F0016

0F0116

0F0616

0F0716

DI7

DI6

DI1

DI0

0F0016

0F0116

0F0616

0F0716

Automatic transfer executed

Automatic transfer RAM of serial I/O (addresses 0F0016 to 0FFF16, its addresses 0F6016 to 0FFF16

shared by FLD automatic display RAM

SIORAM

The area of addresses 0F0816 to 0FFF16, which is not used as automatic transfer,

can be used as normal RAM; the area of addresses 0F6016 to 0FFF16 can be

used as FLD automatic display RAM.

0716

Transfer counter

Serial I/O1

automatic transfer

data pointer

0716

Serial I/O1 clock pin: SCLK11

0716

Set the number of transfer bytes – 1 = 7

(Automatic transfer stars by writing to this register

when selecting an internal synchronous clock.)

Fig. 2.3.27 Relevant registers setting

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