CHAPTER 15 SERIAL INTERFACE CSI10
Preliminary User’s Manual U16315EJ1V0UD
312
Figure 15-1. Block Diagram of Serial Interface CSI10
8
8
SO10/P12
INTCSI10
SI10/P11/R
X
D0
Output
selector
f
X
/2 to f
X
/2
7
SCK10/P10/T
X
D0
Internal bus
Serial I/O shift
register 10 (SIO10)
Transmit buffer
register 10 (SOTB10)
Output latch
Transmit controller
Clock start/stop controller &
clock phase controller
Selector
Transmit data
controller
(1) Transmit buffer register 10 (SOTB10)
This register sets the transmit data.
Transmission/reception is started by writing data to SOTB10 when bit 6 (TRMD10) of serial operation mode
register 10 (CSIM10) is 1.
The data written to SOTB10 is converted from parallel data into serial data by serial I/O shift register 10, and
output to the serial output pin (SO10).
SOTB10 can be written or read by an 8-bit memory manipulation instruction.
RESET input makes this register undefined.
Caution
Do not access SOTB10 when CSOT10 = 1 (during serial communication).
(2) Serial I/O shift register 10 (SIO10)
This is an 8-bit register that converts data from parallel data into serial data and vice versa.
This register can be read by an 8-bit memory manipulation instruction.
Reception is started by reading data from SIO10 if bit 6 (TRMD10) of serial operation mode register 10 (CSIM10)
is 0.
During reception, the data is read from the serial input pin (SI10) to SIO10.
RESET input clears this register to 00H.
Caution
Do not access SIO10 when CSOT10 = 1 (during serial communication).
Содержание 78K0/KD1 Series
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