UPD78F0078GK-9ET-A Renesas Electronics America, UPD78F0078GK-9ET-A Datasheet - Page 320

• Manufacturer Part Number: UPD78F0078GK-9ET-A
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0078GK-9ET-A

• Lead Free Status / Rohs Status: Supplier Unconfirmed

17.1 Functions of Serial Interface CSI1
(1) Operation stop mode
(2) 3-wire serial I/O mode (MSB/LSB-first selectable)
17.2 Configuration of Serial Interface CSI1
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Serial interface CSI1 has the following two modes.
Serial interface CSI1 includes the following hardware.
This mode is used when serial transfer is not performed. In this mode, the power consumption can be reduced.
For details, see 17.4.1 Operation stop mode.
This mode is used to transfer 8-bit data by using three lines: a serial clock line (SCK1) and two serial data lines
(SI1 and SO1).
The processing time of data transfer can be shortened in the 3-wire serial I/O mode because transmission and
reception can be simultaneously executed. In addition, whether 8-bit data is transferred with the MSB or LSB
first can be specified, so this interface can be connected to any device.
The 3-wire serial I/O mode can be used when connecting ICs and display controllers having a clocked serial
interface. For details, see 17.4.2 3-wire serial I/O mode.
Registers
Control registers
Item
Table 17-1. Configuration of Serial Interface CSI1
CHAPTER 17 SERIAL INTERFACE CSI1
Transmit buffer register 1 (SOTB1)
Serial I/O shift register 1 (SIO1)
Transmit controller
Clock start/stop controller & clock phase controller
Serial operation mode register 1 (CSIM1)
Serial clock select register 1 (CSIC1)
Port mode register 2 (PM2)
Port register 2 (P2)
User’s Manual U14260EJ4V0UD
Configuration