NEC mPD780208 Subseries User Manual page 274

(b) Automatic data transmit/receive control register (ADTC)
ADTC is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input sets ADTC to 00H.
Symbol
<7> <6> <5>
ADTC RE ARLD ERCE ERR
Notes 1. Bits 3 and 4 (TRF and ERR) are read-only bits.
2. The termination of automatic transmission/reception should be judged by using TRF, not CSIIF1
(interrupt request flag).
Caution When external clock input is selected with bit 1 (CSIM11) of serial operating mode register
1 (CSIM1) set to 0, set STRB and BUSY1 of ADTC to 0, 0 (handshake control cannot be
executed when an external clock is input).
Remark ×: don't care
274
CHAPTER 14 SERIAL INTERFACE CHANNEL 1
<4> <3> <2> <1> <0>
TRF STRB BUSY1 BUSY0
R/W
R/W
R/W
R/W
R/W
User's Manual U11302EJ4V0UM
Address After reset
FF69H 00H
BUSY1 BUSY0 Busy input control
0 x Not using busy input
1 0 Busy input enabled (active high)
1 1 Busy input enabled (active low)
STRB Strobe output control
0 Strobe output disabled
1 Strobe output enabled
R
TRF Status of automatic transmit/receive function
Detection of termination of automatic transmission/
0
reception (This bit is set to 0 upon suspension of
automatic transmission/reception or when ARLD = 0.)
During automatic transmission/reception
1
(This bit is set to 1 when data is written to SIO1.)
R
ERR Error detection of automatic transmit/receive
function
No error
0
(This bit is set to 0 when data is written to SIO1.)
1 Error occurred
ERCE Error check control of automatic transmit/
receive function
0 Error check disabled
1 Error check enabled (only when BUSY1 = 1)
ARLD Operating mode selection of automatic transmit/
receive function
0 Single operating mode
1 Repetitive operating mode
RE Receive control of automatic transmit/receive
function
0 Receive disabled
1 Receive enabled
R/W
Note 1
R/W
Note 2