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38K2 Datasheet(PDF) 194 Page - Renesas Technology Corp

Part # 38K2
Description  RENESAS 8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
PDF  358 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

38K2 Datasheet(HTML) 194 Page - Renesas Technology Corp

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2.4 Serial I/O
Rev.2.00
Oct 15, 2006
page 45 of 112
38K2 Group
REJ09B0338-0200
APPLICATION
2.4.3 Serial I/O connection examples
(1)
Control of peripheral IC equipped with CS pin
Figure 2.4.10 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. 2.4.10 Serial I/O connection examples (1)
Port
SCLK
TXD
RXD
Port
CS
CLK
IN
OUT
CS
CLK
IN
OUT
(4) Connection of plural IC
38K2 group
Peripheral IC 1
Peripheral IC 2
Port
SCLK
TXD
CS
CLK
IN
OUT
(2) Transmission and reception
38K2 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
38K2 group
Peripheral IC
(E PROM etc.)
2
✽2
Notes: “Port” means an output port controlled by software.
Port
SCLK
TXD
CS
CLK
DATA
(1) Only transmission
(Using the RXD pin as an I/O port)
38K2 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
RXD



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