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14.1 Functions of Serial Interface Channel 1
Serial interface channel 1 has the following three modes.
Operation Mode
Pins Used
Operation stop
mode
3-wire serial I/O
SCK1 (serial clock),
mode
SO1 (serial output),
(MSB-/LSB-first
SI1 (serial input)
switchable)
3-wire serial I/O
SCK1 (serial clock),
mode with
SO1 (serial output),
automatic transmit/
SI1 (serial input)
receive function
(MSB-/LSB-first
switchable)
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CHAPTER 14 SERIAL INTERFACE CHANNEL 1
Table 14-1. Modes of Serial Interface Channel 1
–
• Used when serial transfer is not carried out.
• Power consumption can be reduced.
• Input and output lines are independent and
they can transfer/receive at the same time, so
the data transfer processing time is short.
• The start bit of 8-bit data to undergo serial
transfer is switchable between MSB and LSB.
• Mode with same function as 3-wire serial I/O
mode above plus automatic transmit/receive
function.
• Can transmit/receive data with a maximum of
64 bytes. Therefore, this function enables the
hardware to transmit/receive data to/from the
OSD (On Screen Display) device and device
with
on-chip
independently of the CPU thus the software
load can be reduced.
User's Manual U11302EJ4V0UM
Features
display
controller/driver
Usage
–
These modes are used
for connection of
peripheral ICs and
display controllers that
incorporate a clocked
serial interface.
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