M16CSLASH62 datasheet(165/615 Pages) RENESAS

165 / 615 page

Mitsubishi microcomputers

M16C / 62A Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

S I/O3, 4

1-146

SI/Oi bit rate generator (Note 1, 2)

Symbol

Address

When reset

S3BRG

036316

Indeterminate

S4BRG

036716

Indeterminate

Assuming that set value = n, BRGi divides the count

source by n + 1

0016 to FF16

Values that can be set

SI/Oi transmit/receive register (Note)

Symbol

Address

When reset

S3TRR

036016

Indeterminate

S4TRR

036416

Indeterminate

Transmission/reception starts by writing data to this register.

After transmission/reception finishes, reception data is input.

S I/Oi control register (i = 3, 4) (Note 1)

Symbol

Address

When reset

SiC

036216, 036616

4016

b4 b3

Description

SMi5

SMi1

SMi0

SMi3

SMi6

SMi7

Internal synchronous

clock select bit

Transfer direction select

bit

S I/Oi port select bit

(Note 2)

SOUTi initial value

set bit

0 0 : Selecting f1

0 1 : Selecting f8

1 0 : Selecting f32

1 1 : Must not be set.

b1 b0

0 : External clock

1 : Internal clock

Effective when SMi3 = 0

0 : L output

1 : H output

0 : Input-output port

1 : SOUTi output, CLK function

Bit name

Bit

symbol

Synchronous clock

select bit (Note 2)

0 : LSB first

1 : MSB first

SMi2

SOUTi output disable bit

0 : SOUTi output

1 : SOUTi output disable(high impedance)

Note 1: Set “1” in bit 2 of the protection register (000A16) in advance to write to the

S I/Oi control register (i = 3, 4).

Note 2:

When using the port as an input/output port by setting the SI/Oi port

select bit (i = 3, 4) to “0”, be sure to set the sync clock select bit to “1”.

Nothing is assigned.

In an attempt to write to this bit, write “0”. The value, if read, turns out to be “0”.

Note 1: Write a value to this register while transmit/receive halts.

Note 2: Use MOV instruction to write to this register.

Note: Write a value to this register while transmit/receive halts.

Figure 1.16.32. S I/O3, 4 related register

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