PEF2091 Siemens Semiconductor Group, PEF2091 Datasheet - Page 210

• Manufacturer Part Number: PEF2091
• Description: ICs for Communications(ISDN Echocancellation Circuit)
• Manufacturer: Siemens Semiconductor Group

Semiconductor Group
MX bit - are stored. Additionally, an active MRC enables the control of the MR handshake
bit according to the Monitor channel protocol.
5.2
5.2.1
The Interrupt Status Register (ISTA) generates an interrupt for the selected channel.
Interrupt bits are cleared by reading the corresponding register.
Reset value: 00
D
CICI
CICU
SF
MDR
B1
D-channel Interrupt
1=
0=
C/I-channel Interrupt IOM
1=
0=
C/I-channel Interrupt U
1=
0=
Superframe Marker
1=
0=
1=
0=
B1-channel Interrupt
1=
0=
Detailed Register Description
ISTA-Register
Read
D
7
H
Indicates an interrupt that 8 bits D-channel data have been updated
Occurs after DRI and DRU have been read
Indicates a change in the C/I-channel on IOM
Occurs after CIRI is read
Indicates a change in the C/I-channel coming from the transceiver core
Occurs after CIRU is read
Indicates a superframe marker received from the transceiver core
Occurs when the ISTA-Register has been read
Monitor Data Receive Interrupt
Indicates an interrupt after the MOSR:MDR or the MOSR:MER bits
have been activated
Indicates the inactive interrupt status
Indicates an interrupt every time B1-channel bytes arrive
Occurs after RB1I and RB1U have been read
CICI
6
CICU
Address 0
5
®
-2
SF
4
H
210
MDR
3
B1
2
®
-2
B2
1
Register Description
Data Sheet 01.99
MDA
0
PEB 2091
PEF 2091