M30622ECTFP datasheet(145/184 Pages) MITSUBISHI

145 / 184 page

145

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

Functions for setting an SOUTi initial value

In carrying out transmission, the output level of the SOUTi terminal as it is before transmitting 1-bit

data can be set either to “H” or to “L”. Figure 1.19.31 shows the timing chart for setting an SOUTi initial

value and how to set it.

Figure 1.19.31. Timing chart for setting SOUTi’s initial value and how to set it

S I/Oi operation timing

Figure 1.19.32 shows the S I/Oi operation timing

Figure 1.19.32. S I/Oi operation timing chart

S I/O3, 4

S I/Oi port select bit SMi3 = 0

SOUTi initial value select bit

SMi7 = 1

(SOUTi: Internal

“H” level)

S I/Oi port select bit

SMi3 = 0

(Port select: Normal port

SOUTi)

SOUTi terminal = “H” output

Signal written to the S I/Oi register

=“L”

“H”

“L”

(Falling edge)

SOUTi terminal = Outputting

stored data in the S I/Oi transmission/

reception register

Signal written to the S I/Oi

transmission/reception

SOUTi (internal)

SOUTi's initial value

set bit (SMi7)

SOUTi terminal output

S I/Oi port select bit

(SMi3)

Setting the SOUTi

initial value to H

Port selection

(normal port

SOUTi)

(i = 3, 4)

Initial value = “H” (Note)

Port output

(Example) With “H” selected for SOUTi:

Note: The set value is output only when the external clock has been selected. When

initializing SOUTi, input “H” level to CLKi pin.

If the internal clock has been selected or if SOUT high impedance has been set,

this output goes to the high-impedance state.

Transfer clock

(Note 1)

S I/Oi output SOUTi

S I/Oi input SINi

Signal written to the

S I/Oi register

(Note 2)

Setting the S I/Oi interrupt request bit

Note 1: With the internal clock selected for the transfer clock, the frequency dividing ratio can be selected using

bits 0 and 1 of the S I/Oi control register. (No frequency division, 8-division frequency, 32-division frequency.)

Note 2: With the internal clock selected for the transfer clock, the SOUTi terminal becomes to the high-impedance

state after the transfer finishes.

Note 3: In M30623(80-pin package), the input pin SIN3 of S I/O3 is not connected to external pin.

(i= 3, 4)

(Note 3)

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