upd78f0114hgb-8es-a Renesas Electronics Corporation., upd78f0114hgb-8es-a Datasheet - Page 302

• Manufacturer Part Number: upd78f0114hgb-8es-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

14.1 Functions of Serial Interface CSI10
(1) Operation stop mode
(2) 3-wire serial I/O mode (MSB/LSB-first selectable)
14.2 Configuration of Serial Interface CSI10
302
Serial interface CSI10 has the following two modes.
Serial interface CSI10 includes the following hardware.
This mode is used when serial communication is not performed and can enable a reduction in the power
consumption.
For details, see 14.4.1 Operation stop mode.
This mode is used to communicate 8-bit data using three lines: a serial clock line (SCK10) and two serial data
lines (SI10 and SO10).
The processing time of data communication 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 communicated 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 is used for connecting peripheral ICs and display controllers with a clocked serial
interface.
For details, see 14.4.2 3-wire serial I/O mode.
Operation stop mode
3-wire serial I/O mode
Registers
Control registers
Item
Table 14-1. Configuration of Serial Interface CSI10
CHAPTER 14 SERIAL INTERFACE CSI10
Transmit buffer register 10 (SOTB10)
Serial I/O shift register 10 (SIO10)
Serial operation mode register 10 (CSIM10)
Serial clock selection register 10 (CSIC10)
Port mode register 1 (PM1)
Port register 1 (P1)
User’s Manual U16961EJ4V0UD
Configuration