XRT75R12IB-F Exar Corporation, XRT75R12IB-F Datasheet - Page 48

• Manufacturer Part Number: XRT75R12IB-F
• Description: Peripheral Drivers & Components (PCIs) 12 Channel 3.3V-5V temp -45 to 85C
• Manufacturer: Exar Corporation

Specifications of XRT75R12IB-F

• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 3.3 V
• Package / Case: TBGA-420
• Ic Interface Type: Parallel, Serial
• Supply Voltage Range: 3.135V To 3.465V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: BGA
• No. Of Pins: 420
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Data Rate Max: 51.84Mbps
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

XRT75R12
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
The Microprocessor Interface section supports communication between the local microprocessor (µP) and the
LIU. The XRT75R12 supports a parallel interface asynchronously or synchronously timed to the LIU. The
microprocessor interface is selected by the state of the Pmode input pin. Selecting the microprocessor
interface mode is shown in
The local µP configures the LIU by writing data into specific addressable, on-chip Read/Write registers. The
µP provides the signals which are required for a general purpose microprocessor to read or write data into
these registers. The µP also supports polled and interrupt driven environments. A simplified block diagram of
the microprocessor is shown in
The LIU may be configured into different operating modes and have its performance monitored by software
through a standard microprocessor using data, address and control signals. These interface signals are
described below in
mode or Synchronous mode.
F
7.0 MICROPROCESSOR INTERFACE BLOCK
7.1
IGURE
P
Addr[7:0]
Pmode
IN
D[7:0]
N
34. S
The Microprocessor Interface Block Signals
AME
IMPLIFIED
T
I/O
YPE
I
I
Table
B
T
T
LOCK
Microprocessor Interface Mode Select Input pin
This pin is used to specify the microprocessor interface mode.
Bi-Directional Data Bus for register "Read" or "Write" Operations.
Eight-Bit Address Bus Inputs
The XRT75R12 LIU microprocessor interface uses a direct address bus. This address bus is
provided to permit the user to select an on-chip register for Read/Write access.
ABLE
ABLE
14. The microprocessor interface can be configured to operate in Asynchronous
Table
D
13: S
14: XRT75R12 M
Figure
IAGRAM OF THE
13.
P
"High"
Addr[7:0]
"Low"
ELECTING THE
RESET
MODE
Pmode
D[7:0]
PCLK
34.
RDY
WR
INT
CS
RD
M
ICROPROCESSOR
ICROPROCESSOR
Microprocessor
M
ICROPROCESSOR
Interface
45
M
D
ICROPROCESSOR
Asynchronous Mode
Synchronous Mode
ESCRIPTION
I
I
NTERFACE
NTERFACE
I
NTERFACE
S
M
B
IGNALS
ODE
LOCK
M
ODE
REV. 1.0.4