參數(shù)資料
型號: XRT83SH314IB
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: 14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
中文描述: DATACOM, PCM TRANSCEIVER, PBGA304
封裝: 31 X 31 MM, 1.27 MM PITCH, PLASTIC, BGA-304
文件頁數(shù): 9/101頁
文件大小: 656K
代理商: XRT83SH314IB
XRT83SH314
5
REV. 1.0.4
14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
DATA7
DATA6
DATA5
DATA4
DATA3
DATA2
DATA1
DATA0
AA4
AB3
AC3
AA5
Y6
AB4
AC4
AB5
I/O
Bi-directional Data Bus
DATA[7:0] is a bi-directional data bus used for read and write operations.
μ
PTS2
μ
PTS1
μ
PTS0
AC23
AB22
AA21
I
Microprocessor Type Select Input
μ
PTS[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)
Reset
B22
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.
N
OTE
:
Internally pulled "High" with a 50K
resistor.
CS5
CS4
CS3
CS2
CS1
B20
A21
C20
D19
B21
O
Chip Select Output
The XRT83SH314 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
N
AME
P
IN
T
YPE
D
ESCRIPTION
RxON
AB19
I
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.
N
OTE
:
Internally pulled "Low" with a 50K
resistor.
RxTSEL
Y15
I
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.
N
OTE
:
Internally pulled "Low" with a 50k
resistor.
MICROPROCESSOR
N
AME
P
IN
T
YPE
D
ESCRIPTION
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