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XRT83VSH316
73
16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.1
TABLE 39: GPIO SELECT 0X00DH BIT DESCRIPTION
GPIO SELECT REGISTER (0X00DH)
BIT
NAME
FUNCTION
Register
Type
Default
Value
(HW reset)
D7
D6
GPIODIR1
GPIODIR0
GPIO Direction Select
These bits select the direction of the external GPIO pins on the
LIU. These pins can be used for general purpose. By default, the
hardware pins are set as inputs.
0 = Input
1 = Output
R/W
0
D5
D4
GPIO1
GPIO0
GPIO Control Status
These pins are used to set/monitor the GPIO pins. If the direction
is input, then these bits monitor the GPIO hardware pins. If the
direction is output, then these bits set the status of the output pins.
R/W
0
D[3:0]
Reserved
These bits are reserved
TABLE 40: RESERVED REGISTER 0X00EH BIT DESCRIPTION
RESERVED REGISTER (0X00EH)
BIT
NAME
FUNCTION
Register
Type
Default
Value
(HW reset)
D[7:0]
Reserved
These bits are reserved
TABLE 41: RESERVED 0X00FH BIT DESCRIPTION
RESERVED REGISTER (0X00FH)
BIT
NAME
FUNCTION
Register
Type
Default
Value
(HW reset)
D[7:0]
Reserved
These bits are reserved