UPD30181 Datasheet, PDF (397/444 Pages) NEC – 64-/32-Bit Microprocessor

CHAPTER 20 SERIAL INTERFACE UNIT 2 (SIU2)
20.3.16 SIUACTMSK_2 (0x0C00 000C)
Bit
Name
R/W
RTCRST
Other resets
7
Reserved
R
0
0
6
Reserved
R
0
0
5
RxDMSK
R/W
0
0
4
RTSMSK
R/W
0
0
3
DCDMSK
R/W
0
0
2
DTRMSK
R/W
0
0
1
Reserved
R/W
0
0
0
TxWRMSK
R/W
0
0
Bit
7, 6
5
Name
Reserved
RxDMSK
4
RTSMSK
3
DCDMSK
2
DTRMSK
1
Reserved
0
TxWRMSK
Function
0 is returned when read
Mask for notification of change on RxD2
1 : Mask
0 : Unmask
Mask for notification of change on RTS2#
1 : Mask
0 : Unmask
Mask for notification of change on DCD2#
1 : Mask
0 : Unmask
Mask for notification of change on DTR2#
1 : Mask
0 : Unmask
Write 0 when write. 0 is returned when read
Mask for notification of transmit buffer write
1 : Mask
0 : Unmask
This register is used to set masks for notification of operation statuses to the Activity Timer of the SIU2.
When 1 is set in this register, state transition of the corresponding signals or write to transmit buffer is not notified
to the Activity Timer.
User’s Manual U14272EJ3V0UM
397