Chapter 16 Serial Interfaces Csi10 And Csi11; Functions Of Serial Interfaces Csi10 And Csi11 - NEC 78K0 Series User Manual

CHAPTER 16 SERIAL INTERFACES CSI10 AND CSI11

µ
The PD78F0531, 78F0532, and 78F0533 incorporate serial interface CSI10, and the
78F0536, 78F0537, and 78F0537D incorporate serial interfaces CSI10 and CSI11.

16.1 Functions of Serial Interfaces CSI10 and CSI11

Serial interfaces CSI10 and CSI11 have the following two modes.
• Operation stop mode
• 3-wire serial I/O mode
(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, see 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 (SCK1n) and two serial data
lines (SI1n and SO1n).
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 16.4.2 3-wire serial I/O mode.
µ
Remark n = 0:
µ
n = 0, 1:
384
PD78F0531, 78F0532, 78F0533
PD78F0534, 78F0535, 78F0536, 78F0537, 78F0537D
Preliminary User's Manual U17260EJ3V1UD
µ
PD78F0534, 78F0535,