3.0 Software Interface
RC96V24DP
3.3 Interface Memory Bit Functions
Single Device Data/Modem Data Pump
3-4
D96V24DSA
FLAGS
OF:0
Flag Sequence. Reports transmission status of the Flag sequence in HDLC mode, or
transmission of a constant mark in parallel asynchronous mode.
GTE
03:1
Guard Tone Enable. Enables transmission of the 1800 Hz guard tone (CCITT
configuration only).
HDLC
03:6
High Level Data Link Control. Enables HDLC protocol support in parallel data mode.
IFIX
04:2
Eye Fix. Forces EYEX and EYEY serial data to be rotated equalizer output.
IOX
1D:3
I/O Register Select. Specifies that the X RAM ADDRESS (XADD) is an internal I/O
register address.
L2ACT
07:5
Loop 2 (Local Digital Loopback) Activate. Selects connection of the receiver’s digital
output Internally to the transmitter’s digital input (locally activated digital loopback).
L3ACT
07:3
Loop 3 (Local Analog Loopback) Activate. Selects connection of the transmitter’s
analog output Internally to the receiver’s analog input (local analog Ioopback).
LL
09:3
Leased Line. Selects leased line data mode or handshake mode.
NCIA
1F:6
NEWC Interrupt Active. Reports that the cause of an interrupt request was completion of
a configuration change. (See NEWC and NCIE.)
NCIE
1F:2
NEWC interrupt Enable. Enables the assertion of IRQ and the setting of the NCIA bit.
NEWC
I F:0
New Configuration. Initiates a new configuration; cleared by the modem upon
completion of configuration change. This bit can cause IRQ to be asserted. (See NCIE
and NCIA.)
NEWS
1F:3
New Status. Reports the detection of a change In selected status bits. This bit can cause
IRQ to be asserted. (See NSIE and NSIA.)
NSIA
1F:7
NEWS Interrupt Active. Reports that the cause of an interrupt request was a status bit
change. (See NEWS and NSIE.)
NSIE
1F:4
NEWS interrupt Enable. Enables the assertion of IRQ and the setting of the NSIA bit.
(See NEWS.)
NV25
09:7
Disable V.25 Answer Sequence (Data Modes), Disable Echo Suppressor Tone (Fax
Modes). Disables the transmitting of the 2100 Hz CCI1T answer tone when a handshake
sequence Is initiated In a data mode or disables sending of the echo suppressor tone in a
fax mode.
OE
OE:3
Overrun Error. Reports overrun status of the Receiver Data Buffer (RBUFFER).
ORG
09:4
Originate. Selects originate or answer mode.
PE
OE:5
Parity Error. Reports parity error status or bad CRC
PNSUC
OB:2
PN Success. Indicates that the receiver has detected the PN portion of the training
sequence.
RA
07:1
Relay A Activate. Activates the RADRV output.
PARSL
06:4.5
Parity Select. Selects stuff, space, even, or odd parity in the asynchronous parallel data
mode.
Table 3-2. Interface Memory Bit Functions (Continued)
Mnemonic
Memory
Location
Name/Description
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