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2-50
3886 Group User’s Manual
APPLICATION
2.4 Serial I/O
2.4.3 Serial I/O connection examples
(1)
Control of peripheral IC equipped with CS pin
Figure 2.4.15 shows connection examples of a peripheral IC equipped with the CS pin.
There are connection examples using a clock synchronous serial I/O mode.
Fig. 2.4.15 Serial I/O connection examples (1)
Port
SCLK
TXD
RXD
Port
CS
CLK
IN
OUT
CS
CLK
IN
OUT
(4) Connection of plural IC
3886 group
Peripheral IC 1
Peripheral IC 2
Port
SCLK
TXD
CS
CLK
IN
OUT
(2) Transmission and reception
3886 group
Peripheral IC
(E PROM etc.)
2
(3) Transmission and reception
(When connecting RXD with TXD)
(When connecting IN with OUT in
peripheral IC)
CS
CLK
IN
OUT
3886 group
Peripheral IC
(E PROM etc.)
2
“Port” means an output port controlled by software.
When serial I/O2 is used, SOUT and SIN are used,
not TxD and RxD.
Notes 1:
2:
Port
SCLK
TXD
CS
CLK
DATA
(1) Only transmission
(Using the RXD pin as an I/O port)
3886 group
Peripheral IC
(OSD controller etc.)
1
1: Select an N-channel open-drain output for TXD pin output control.
2: Use the OUT pin of peripheral IC which is an N-channel open-
drain output and becomes high impedance during receiving data.
Port
SCLK
TXD
RXD