XRT74L74 Datasheet, PDF (89/498 Pages) Exar Corporation – 4 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER

PRELIMINARY
XRT74L74
4 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER
REV. P1.1.1
TRANSMIT UTOPIA INTERFACE BLOCK
This section presents the Register Description/Ad-
dress Map of the control registers associated with the
Transmit UTOPIA/POS-PHY Interface blocks.
TABLE 2: TRANSMIT UTOPIA INTERFACE BLOCK - REGISTER/ADDRESS MAP
ADDRESS LOCATION
REGISTER NAME
TYPE
0x0581
0x0582
0x0583
0x0584 - 0x0592
0x0593
0x0594 - 0x0596
0x0597
0x0598 - 0x10FF
TRANSMIT UTOPIA/POS-PHY CONTROL REGISTERS
Transmit UTOPIA/POS-PHY Control Register - Byte 2
Transmit UTOPIA/POS-PHY Control Register - Byte 1
Transmit UTOPIA/POS-PHY Control Register - Byte 0
Reserved
Transmit UTOPIA Port Address Register
Reserved
Transmit UTOPIA Port Number Register
Reserved
R/W
R/W
R/W
R/O
R/W
R/O
R/W
R/O
DEFAULT
VALUE
0x38
0x00
0x00
0x00
0x00
0x00
0x00
0x00
TRANSMIT UTOPIA/POS-PHY CONTROL REGISTER - BYTE 0 (ADDRESS = 0X0583)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
UTOPIA
Level 3
Disable
Multi-PHY
Polling
Enable
Back to Back Direct Status UTOPIA/POS-PHY Data Bus
Polling
Indication
Width
Enable
Enable
Cell Size[1:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1
1
0
0
1
1
1
1
BIT NUMBER
NAME
7
UTOPIA Level 3 Disable
TYPE
R/W
DESCRIPTION
87