M16CSLASH62 datasheet(354/621 Pages) RENESAS

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Clock-Synchronous Serial I/O

Mitsubishi microcomputers

M16C / 62 Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

339

Example of wiring

Example of operation

UART1 Transmit

interrupt request bit “0”

“1”

Cleared to “0” when interrupt request is accepted, or cleared by software

Transmit buffer

empty flag

CLK1

TxD1

“0”

“1”

Transmit enable bit

“0”

“1”

Transfer clock

CLKS1

D0 D1 D2 D3

D4 D5 D6

D0 D1

D2 D3 D4 D5 D6 D7

CLK, CLKS

select bit 1

“0”

“1”

“0”

“1”

CLK, CLKS

select bit 0

(1) Transmission enabled

(2) Start transmission

(3) Transmission is complete

(4) Clock switched

(TE)

(TI)

(CLKMD1)

(CLKMD0)

(IR)

Figure 2.4.10. Operation timing of transmission in clock-synchronous serial I/O mode, transfer

clock output from multiple pins function selected

Microcomputer

TXD1 (P67)

CLKS1 (P64)

CLK1 (P65)

CLK

Note: This applies when performing only transmission with an internal

clock selected in the clock synchronous serial I/O mode.

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