M30622ECTFP datasheet(143/184 Pages) MITSUBISHI

143 / 184 page

143

Tentative Specifications REV.A

Mitsubishi microcomputers

M16C / 62T Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Specifications in this manual are tentative and subject to change.

Under

development

UART2 Special Mode Register

S I/O3, 4

S I/O3 and S I/O4 are exclusive clock-synchronous serial I/Os.

In M30623(80-pin package), SIN3 is not connected to external pin, so S I/O3 is exclusive transmission.

Figure 1.19.28 shows the S I/O3, 4 block diagram, and Figure 1.19.29 shows the S I/O3, 4 control register.

Table 1.19.10 shows the specifications of S I/O3, 4.

Figure 1.19.28. S I/O3, 4 block diagram

Figure 1.19.29. S I/O3, 4 control register

S I/O3, 4

S I/Oi transmission/reception register (8)

S I/O counter i (3)

Synchronous

circuit

f32

Data bus

S I/Oi

interrupt request

SMi5 LSB

MSB

SMi2

SMi3

SMi6

SMi1

SMi0

P90/CLK3

(P95/CLK4)

P92/SOUT3

(P96/SOUT4)

P91/SIN3

(P97/SIN4)

Transfer rate register (8)

SMi6

Note 1: In M30623(80-pin package), P91/SIN3 is not connected to external pin.

Note 2: i = 3, 4.

ni = A value set in the S I/O transfer rate register i (036316, 036716).

1/(ni+1)

1/2

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

Symbol

Address

When reset

SiC

036216, 036616

4016

b2 b1

Description

SMi5

SMi1

SMi0

SMi3

SMi6

SMi7

Internal synchronous

clock select bit

Transfer direction lect 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 : Not to be used

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 high impedance

control bit

0 : SOUTi output

1 : SOUTi 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 set “0” to SMi3 (i = 3, 4) and select input - output port, set “1” to SMi6

(i = 3, 4) and select internal clock, or input “H” to P90 and P95.

Nothing is assigned.

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

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