
PRELIMINARY
XRT86SH328
197
REV. P1.0.6
28-CHANNEL DS1/E1 FRAMER/LIU WITH DS3 MUX & VT-MAPPER - SONET APPLICATIONS
register.
`
1 - Indicates that the Receive FEAC Message Validation Interrupt has occurred since the last read of this register.
BIT7 - Receive Any Kind of LAPD Message:
This READ/WRITE bit-field is used to configure the Receive LAPD Controller block to receive any kind of LAPD
Message (or HDLC Message) with a size of 82 bytes or less. If the user implements this option, then the Receive LAPD
Controller block will be capable of receiving any kind of HDLC Message (with any value the header bytes). The only
restriction is that the size of the HDLC Message must not exceed 82 bytes.
`
0 - Does not invoke the Any Kind of HDLC Message feature.
In this case, the Receive LAPD Controller block will only receive HDLC Messages that contains the Bellcore GR-499-
CORE values for SAPI and TEI.
`
1 - Invokes this Any Kind of HDLC Message feature.
In this case, the Receive LAPD Controller block will be able to receive HDLC Messages that contains any header byte
values.
N
OTE
:
The user can determine the size (or byte count) of the most recently received LAPD/PMDL Message by reading
the contents of the Receive LAPD Byte Count Register (Address = 0x0E84).
BIT[6:3] - Unused:
BIT 2 - Receive LAPD Controller Block Enable:
This READ/WRITE bit-field is used to either enable or disable the Receive LAPD Controller block within the Receive
DS3 Framer block. If the user enables the Receive LAPD Controller block, then it will immediately begin extracting out
and monitoring the data (being carried via the DL bits) within the incoming DS3 data-stream.
`
0 - Disables the Receive LAPD Controller block.
`
1 - Enables the Receive LAPD Controller block.
BIT 1 - Receive LAPD Message Interrupt Enable:
This READ/WRITE bit-field is used to either enable or disable the Receive LAPD Message Interrupt. If this interrupt is
enabled, then the Receive DS3 Framer block will generate an interrupt anytime the Receive LAPD Controller block
receives a new PMDL Message.
`
0 - Disables the Receive LAPD Message Interrupt.
`
1 - Enables the Receive LAPD Message Interrupt.
BIT 0 - Receive LAPD Message Interrupt Status:
This RESET-upon-READ bit-field indicates whether or not the Receive LAPD Message Interrupt has occurred since the
last read of this register.
`
0 - Indicates that the Receive LAPD Message Interrupt has NOT occurred since the last read of this register.
`
1 - Indicates that the Receive LAPD Message' Interrupt has occurred since the last read of this register.
T
ABLE
256: DS3 F
RAMER
B
LOCK
- R
ECEIVE
LAPD C
ONTROL
R
EGISTER
(A
DDRESS
= 0
X
0E18)
BIT7
BIT6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Receive Any
Kind of
LAPD
Message
Unused
Receive
LAPD
Controller
Block Enable
Receive
LAPD
Message
Interrupt
Enable
Receive
LAPD
Message
Interrupt
Status
R/W
R/O
R/O
R/O
R/O
R/W
R/W
RUR
0
0
0
0
0
0
0
0