XRT83VSH28ES Exar, XRT83VSH28ES Datasheet - Page 10

• Manufacturer Part Number: XRT83VSH28ES
• Description: Peripheral Drivers & Components - PCIs 8 CH E1 LIU SH (low cost version)
• Manufacturer: Exar

Specifications of XRT83VSH28ES

• Product Category: Peripheral Drivers & Components - PCIs
• Rohs: yes

XRT83VSH28
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
S
IGNAL
RXRES1
RXRES0
RCLKE/
µPTS1
N
AME
L
BGA
EAD
R10
V10
J16
#
T
YPE
I
I
Receive External Resistor Control Pins
Hardware mode Only
These pins are used in the Receive Internal Impedance mode for unique applica-
tions where an accurate resistor can be used to achieve optimal return loss. When
RxRES[1:0] are used, the LIU automatically sets the internal impedance to match
the line build out. For example: if 240 is selected, the LIU chooses an internal
impedance such that the parallel combination equals the impedance chosen by
TERSEL[1:0].
"00" = No External Fixed Resistor
"01" = 320
"10" = 280
"11" = 190
N
Receive Clock Edge
Hardware Mode
This pin is used to select which edge of the recovered clock is used to update data to
the receiver on the RPOS/RNEG outputs. By default, data is updated on the risinge
edge. To udpdate data on the falling edge, this pin must be pulled "High".
Host Mode
PTS[2:1] pins are used to select the type of microprocessor to be used for Host
communication.
"00" = 8051 Intel Asynchronous
"01" = 68K Motorola Asynchronous
"10" = Power PC 403
"11" = MPC8xx Power PC Synchronous
N
OTE
OTE
: These pins are internally pulled “Low” with a 50k resistor. This feature is
: This pin is internally pulled “Low” with a 50k resistor.
available in Host mode by programming the appropriate channel register.
7
D
ESCRIPTION
REV. 2.0.0