Datasheet

78K0/Ix2 CHAPTER 16 SERIAL INTERFACE CSI11
R01UH0010EJ0500 Rev.5.00 549
Feb 28, 2012
CHAPTER 16 SERIAL INTERFACE CSI11
78K0/IY2 78K0/IA2 78K0/IB2 Item
16 pins 20 pins 30 pins 32 pins
Serial interface CSI11
 
Remark : Mounted, : Not mounted
16.1 Functions of Serial Interface CSI11
Serial interface CSI11 has the following two modes.
(1) Operation stop mode
This mode is used when serial communication is not performed and can enable a reduction in the power consumption.
For details, refer to 16.4.1 Operation stop mode.
(2) 3-wire serial I/O mode (MSB/LSB-first selectable)
This mode is used to communicate 8-bit data using three lines: a serial clock line (SCK11) and two serial data lines
(SI11 and SO11).
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, refer to 16.4.2 3-wire serial I/O mode.
16.2 Configuration of Serial Interface CSI11
Serial interface CSI11 includes the following hardware.
Table 16-1. Configuration of Serial Interface CSI11
Item Configuration
Controller
Transmit controller
Clock start/stop controller & clock phase controller
Registers
Transmit buffer register 11 (SOTB11)
Serial I/O shift register 11 (SIO11)
Control registers
Serial operation mode register 11 (CSIM11)
Serial clock selection register 11 (CSIC11)
Port mode registers 0 and 3 (PM0, PM3)
Port register 3 (P3)