Baseband Processor For Mixed Mode Land Mobile Radio
CMX880
$CE INTERRUPT MASK: 16-bit write-only
Bit:
15
14
13
12
11
10
9
8
IRQ
MASK
RX
FFSK/MSK
SYNC EN
RX
RX
Unlisted
Tone
MASK
C4FM FS
Tolerance
MASK
RX
CTCSS
MASK
RX DCS
MASK
FFSK/MSK FFSK/MSK
SYNT EN
SYND EN
Bit:
7
6
5
4
3
2
1
0
RX C4FM
detected
MASK
RX Selcall
MASK
RX
FFSK/MSK
MASK
TX data
MASK
RX data
MASK
RSSI
High
MASK
RSSI
Low
MASK
Prog
Flag
MASK
Bit
15
Function
Enable selected interrupts
Disable all interrupts.
1
0
12,13,14
11
ü 1
þ 0
Enable corresponding FFSK/MSK sync pattern detection
Disable corresponding FFSK/MSK sync pattern detection
1
Enable interrupts for ‘Unlisted Tone’ detection status changes.
See ‘INTERRUPT MASK’ register bit 9 and bit 6.
0
Disable ‘Unlisted Tone’ detection status changes from issuing interrupts.
10
9
1
0
Enable interrupt when C4FM FS tolerance data is available
Disabled
1
Enable interrupt when a change to a programmed CTCSS tone is detected,
by a change of state on bit 7 of the ‘SUB-AUDIO AND SELCALL STATUS’
register. Also, if bit 11 of the ‘INTERRUPT MASK’ register is set to 1,
enable interrupt when a change to a valid but unlisted CTCSS tone is
detected, by a change of state on bit 4 of the ‘ SUB-AUDIO AND SELCALL
STATUS’ register.
0
Disabled
1,2,5,8
1
0
Enable interrupt when corresponding status changes
Disabled
7
6
1
0
Enable interrupt when received C4FM signal is detected
Disabled
1
Enable interrupt when a change to a programmed Selcall tone is detected
by a change of state on bit 15 of the ‘ SUB-AUDIO AND SELCALL
STATUS’ register. Also, if bit 11 of the ‘INTERRUPT MASK’ register is set
to 1, enable interrupt when a change to a valid but unlisted Selcall tone is
detected, by a change of state on bit 12 of the ‘ SUB-AUDIO AND
SELCALL STATUS’ register.
0
Disable
4
3
0
1
0
Enable interrupt when TX data required
Disabled
1
0
Enable interrupt when RX data is available
Disabled
1
Enable interrupt when Prog Flag bit of ‘STATUS’ register changes
(see ‘PROGRAMMING REGISTER’ $C8)
Disabled
0
ã 2001 Consumer Microcircuits Limited
49
D/880/1
CMLMICRO [ CML MICROCIRCUITS ]
