CMX867E2 View Datasheet(PDF) - CML Microsystems Plc
Part Name
Description
MFG CO.
'CMX867E2' PDF : 46 Pages View PDF
Low Power V.22 Modem
CMX867
1.5.10.7 Status Register
Status Register: 16-bit read-only. C-BUS address $E6
Bits 13-0 of this register are cleared to 0 by a General Reset command, or when b7 (Reset) of the
General Control Register is 1.
Bit: 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
IRQ RD PF
See below for uses of these bits
The meanings of the Status Register bits 12-0 depend on whether the receive circuitry is in Modem or
Tones Detect mode.
Status Register bits:
Rx Modem modes
Rx Tones Detect modes
** IRQ
Mask bit
b15
IRQ
b14
Set to 1 on Ring Detect
b5
b13
Programming Flag bit. See 1.5.10.8
b4
b12
Set to 1 on Tx data ready.
b3
Cleared by write to Tx Data Register
b11
Set to 1 on Tx data underflow.
b3
Cleared by write to Tx Data Register
b10 1 when energy is detected in Rx
1 when energy is detected in Call
b2
modem signal band
Progress band or when both
programmable tones are detected
b9 1 when double DPSK dibit 00,11 0
b1
pattern is detected in 1200bps
DPSK mode, or when ‘1010..’
pattern is detected in all other
modes
b8 See following table
0
b1
b7 See following table
1 when 2100Hz answer tone or the
b1
second programmable tone is
detected
b6 Set to 1 on Rx data ready.
Cleared by read from Rx Data
Register
1 when 2225Hz answer tone or the
b0
first programmable tone is detected
b5 Set to 1 on Rx data overflow.
1 when DTMFcode is detected
b0
Cleared by read from Rx Data
Register
b4 Set to 1 on Rx framing error
0
-
b3 Set to 1 on even Rx parity
Rx DTMF code b3, see table
-
b2 DPSK Rx signal quality b2
Rx DTMF code b2
-
b1 DPSK Rx signal quality b1
Rx DTMF code b1
-
b0 DPSK Rx signal quality b0
Rx DTMF code b0
-
or FSK frequency demodulator
output
© 2004 Consumer Microcircuits Limited
29
D/867/5
Share Link: 
