XRT83SL314 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
XRT83SL314 Datasheet PDF : 83 Pages
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XRT83SL314
REV. 1.0.1
MICROPROCESSOR
NAME
PIN
DATA7
AA4
DATA6
AB3
DATA5
AC3
DATA4
AA5
DATA3
Y6
DATA2
AB4
DATA1
AC4
DATA0
AB5
µPTS2
µPTS1
µPTS0
AC23
AB22
AA21
Reset
B22
CS5
B20
CS4
A21
CS3
C20
CS2
D19
CS1
B21
xr
14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
TYPE
I/O
DESCRIPTION
Bi-directional Data Bus
DATA[7:0] is a bi-directional data bus used for read and write operations.
I
Microprocessor Type Select Input
µPTS[2:0] are used to select the microprocessor type interface.
000 = Intel 68HC11, 8051, 80C188 (Asynchronous)
001 = Motorola 68K (Asynchronous)
111 = Motorola MPC8260, MPC860 Power PC (Synchronous)
I
Hardware Reset Input
Active low signal. When this pin is pulled "Low" for more than 10µS, the inter-
nal registers are set to their default state. See the register description for the
default values.
NOTE: Internally pulled "High" with a 50KΩ resistor.
O
Chip Select Output
The XRT83SL314 can be used to provide the necessary chip selects for up to
5 additional devices by using the 3 MSBs ADDR[10:8] from the 11-Bit address
bus. The LIU allows up to 84-channel applications with only using one chip
select. See the ADDR[10:0] definition in the pin description.
RECEIVER SECTION
NAME
PIN
RxON
AB19
RxTSEL
Y15
TYPE
I
I
DESCRIPTION
Receive On/Off Input
Upon power up, the receivers are powered off. Turning the receivers On or Off
can be selected through the microprocessor interface by programming the
appropriate channel register if the hardware pin is pulled "High". If the hard-
ware pin is pulled "Low", all channels are automatically turned off.
NOTE: Internally pulled "Low" with a 50KΩ resistor.
Receive Termination Control
Upon power up, the receivers are in "High" impedance. Switching to internal
termination can be selected through the microprocessor interface by program-
ming the appropriate channel register. However, to switch control to the hard-
ware pin, RxTCNTL must be programmed to "1" in the appropriate global
register. Once control has been granted to the hardware pin, it must be pulled
"High" to switch to internal termination.
NOTE: Internally pulled "Low" with a 50kΩ resistor.
5
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