
XRT73R12
58
REV. 1.0.3
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
THE GLOBAL/CHIP-LEVEL REGISTERS
The register set, within the XRT73R12 contains ten global or chip-level registers. These registers control
operations in more than one channel or apply to the complete chip.
This section will present detailed
information on the Global Registers.
REGISTER DESCRIPTION - GLOBAL REGISTERS
TABLE 18: LIST AND ADDRESS LOCATIONS OF GLOBAL REGISTERS
ADDRESS
COMMAND
REGISTER
LABEL
TYPE
REGISTER NAME
0x00
CR0
APST
R/W
APS Transmit Redundancy Control Register 0-5
0x08
CR8
APSR
R/W
APS Receive Redundancy Control Register 0-5
0x80
CR128
APST
R/W
APS Transmit Redundancy Control Register 6-11
0x88
CR136
APSR
R/W
APS Receive Redundancy Control Register 6-11
0x60
CR96
CIE
R/W
Channel 0-5 Interrupt Enable flags
0x61
CR97
CIS
R/O
Channel 0-5 Interrupt Status flags
0xE0
CR224
CIE
R/W
Channel 6-11 Interrupt Enable flags
0xE1
CR225
CIS
R/O
Channel 6-11 Interrupt Status flags
0x6E
CR110
PN
ROM
Device Part Number Register
0x6F
CR111
VN
ROM
Chip Revision/Version Number Register
TABLE 19: APS/REDUNDANCY TRANSMIT CONTROL REGISTER - CR0 (ADDRESS LOCATION = 0X00)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Reserved
TxON Ch 5
TxON Ch 4
TxON Ch 3
TxON Ch 2
TxON Ch 1
TxON Ch 0
R/W
BIT
NUMBER
NAME
TYPE
DESCRIPTION
7,6
Reserved
5
4
3
2
1
0
TxON Ch 5
TxON Ch 4
TxON Ch 3
TxON Ch 2
TxON Ch 1
TxON Ch 0
R/W
Transmit Section ON - Channel n
This READ/WRITE bit-field is used to turn on or turn off the Transmit Driver associated
with Channel n. If the user turns on the Transmit Driver, then Channel n will transmit
DS3, E3 or STS-1 pulses on the line via the TTIP_n and TRING_ n output pins.
Conversely, if the user turns off the Transmit Driver, then the TTIP_n and TRING_n
output pins will be tri-stated.
0 - Shuts off the Transmit Driver associated with Channel n and tri-states the TTIP_n
and TRING_ n output pins.
1 - Turns on the Transmit Driver associated with Channel n.
NOTE: The master TxON control pin(pin # P4) must be in a high state (logic 1) for this
operation to turn on any channel.