7733 Datasheet, PDF (437/940 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER

APPLICATIONS
17.2 Serial I/O
17.2.2 Examples of transmission for several peripheral ICs (Clock synchronous serial I/O mode)
In this example, transmission for three peripheral ICs is performed with UART0 used. (Note that simulta-
neous transmission for several peripheral ICs is disabled.)
(1) Specifications
ΠClock synchronous serial I/O mode is selected.
 An internal clock is selected. Transfer rate = 2 MHz
Ž MSB first is selected.
 Transmit data is output at the falling edge of the transfer clock.
 Pin TxD0’s output structure: CMOS output
‘ Completion of transmission is determined by checking the transmission register empty flag.
CLK0
CLKS0
CLKS1
TXD0
M37733MHBXXXFP
CLK
IN
Peripheral IC 1
CLK
IN
Peripheral IC 2
CLK
IN
Peripheral IC 3
Fig. 17.2.7 Connection example
17–30
7733 Group User’s Manual