xrt73r06 Exar Corporation, xrt73r06 Datasheet - Page 49

• Manufacturer Part Number: xrt73r06
• Description: Six Channel Ds3/e3 Line Interface Unit Liu With R3 Technologytm
• Manufacturer: Exar Corporation

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SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
The Microprocessor Interface section supports communication between the local microprocessor (µP) and the
LIU. The XRT73R06 supports a parallel interface asynchronously or synchronously timed to the LIU. The mi-
croprocessor interface is selected by the state of the Pmode input pin. Selecting the microprocessor interface
mode is shown in Table 11.
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 Figure 35.
F
7.0 MICROPROCESSOR INTERFACE BLOCK
IGURE
35. S
IMPLIFIED
B
T
LOCK
ABLE
11: S
D
IAGRAM OF THE
ELECTING THE
P
"High"
Addr[7:0]
"Low"
RESET
MODE
Pmode
D[7:0]
PCLK
RDY
WR
INT
CS
RD
M
M
Microprocessor
ICROPROCESSOR
ICROPROCESSOR
Interface
46
M
ICROPROCESSOR
Asynchronous Mode
Synchronous Mode
I
NTERFACE
I
NTERFACE
M
B
ODE
LOCK
M
ODE
XRT73R06
REV. 1.0.0