CHAPTER 12 SERIAL INTERFACE 1A0
232
User’s Manual U15331EJ4V1UD
(b) Automatic data transmit/receive control register 0 (ADTC0)
ADTC0 is set via a 1-bit or 8-bit memory manipulation instruction.
RESET input sets this register to 00H.
Symbol
<7>
<6> 5 4 <3> 2 1 0 Address
After
reset
R/W
ADTC0
RE0
ARLD0
0 0
TRF0
0 0 0
FF79H
00H
R/W
Note 1
RE0
Control of reception of automatic transmit/receive function
0
Reception
disabled
Note 2
1
Reception
enabled
ARLD0
Selection of operation mode for automatic transmit/receive function
0
One-shot
mode
1
Repeat
mode
TRF0
Status of automatic transmit/receive function
Note 3
0
Detection of termination of automatic transmission/reception (this bit is set to 0 upon suspension of automatic
transmission/reception or when ARLD0 = 0)
1
Automatic transmission/reception in progress (this bit is set to 1 when data is written to SIO1A0)
Notes 1.
Bit 3 (TRF0) is read-only.
2.
When RE0 is reset to 0, P25 (CMOS I/O) is used even when bit 7 (CSIE10) of serial operation
mode register 1A0 (CSIM1A0) is set to 1.
3.
Use TRF0, instead of CSIIF10 (interrupt request flag), to identify the completion of automatic
transmission/reception.