7733 datasheet(436/940 Pages) RENESAS

436 / 940 page

APPLICATIONS

7733 Group User’s Manual

17–29

17.2 Serial I/O

Fig. 17.2.5 Case where internal clock is selected

Fig. 17.2.6 Case where external clock is selected

M37733MHBXXXFP

CLK0

CLK

Peripheral IC 1

CLKS0

CLK

Peripheral IC 2

CLKS1

TXD0

CLK

Peripheral IC 3

One of three transmit clock output pins, which is selected by

software, outputs a transmit clock.

Multiple transmit clock output pins can be used only when the

following conditions are satisfied:

q Clock synchronous serial I/O mode is selected.

q Internal clock is selected.

q Only transmission is performed with UART0 used.

CLKi

CTSi

RXDi

CLK

Port

OUT

M37733MHBXXXFP

Microcomputer

TXDi

i = 0 to 2

i = 0 to 2, j = 0 and 1

CLKi

RTSi

RXDi

CLK

Port

OUT

M37733MHBXXXFP

Microcomputer

TXDi

Note: The RTS output function is not assigned for UART2.

Fig. 17.2.4 Case where transmission for several peripheral devices is performed with 1-channel

serial I/O used

(2) Connection with microcomputer

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