XRT79L71 Datasheet, PDF (90/441 Pages) Exar Corporation – 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

XRT79L71
REV. P1.0.3
BIT NUMBER
NAME
1
Enable Interrupt Clear
0
Interrupt Enable
PRELIMINARY
áç
1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
TYPE
R/W
R/W
DESCRIPTION
Enable Auto-Clear of Interrupts Select:
This READ/WRITE bit-field permits the user to configure the
XRT79L71 device to automatically disable all interrupts that are
activated.
0 - Configures the chip to NOT automatically disable any Inter-
rupts following their activation.
1 - Configures the chip to automatically disable all Interrupts fol-
lowing their activation.
Interrupt Enable:
This READ/WRITE bit-field permits the user to configure the
XRT79L71 device to generate interrupt requests to the Micropro-
cessor.
0 - Configures the chip to NOT generate interrupt to the Micro-
processor. All interrupts are disabled and the Microprocessor
must poll the register bits.
1 - Configures the chip to generate interrupts the Microproces-
sor.
OPERATION CONTROL - LOOP-BACK CONTROL REGISTER (ADDRESS = 0X0102)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
Unused
Loop-back Control [3:0]
R/O
R/O
R/O
R/O
R/W
R/W
R/W
0
0
0
0
0
0
0
BIT 0
R/W
0
BIT NUMBER
NAME
7-4
Unused
3-0
Loop-back Control [3:0]
TYPE
R/O
R/W
DESCRIPTION
Loop-back Mode Select:
These READ/WRITE bit-fields permit the user to configure the
XRT79L71 to operate in any of the following loop-back modes.
• Local Medium Loop-back
• Remote Host Loop-back
The following table presents the contents of these bit-fields and
the corresponding Loop-back Modes.
Loop-back Control [3:0] Resulting Loop-back M ode
0000 - 0011
Reserved
0100
Local Medium Loop-back Mode
0101
Remote Host Loop-back Mode
0110 - 1111
Reserved
78