XRT75R06DIB datasheet(49/105 Pages) EXAR

49 / 105 page

áç

XRT75R06D

SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER

REV. 1.0.0

7.1

THE MICROPROCESSOR INTERFACE BLOCK SIGNALS

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 de-

scribed below in Table 12. The microprocessor interface can be configured to operate in Asynchronous mode

or Synchronous mode.

TABLE 12: XRT75R06D MICROPROCESSOR INTERFACE SIGNALS

PIN NAME

TYPE

DESCRIPTION

Pmode

Microprocessor Interface Mode Select Input pin

This pin is used to specify the microprocessor interface mode.

D[7:0]

I/O

Bi-Directional Data Bus for register "Read" or "Write" Operations.

Addr[7:0]

Eight-Bit Address Bus Inputs

The XRT75R06D 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.

Chip Select Input

This active low signal selects the microprocessor interface of the XRT75R06D LIU and

enables Read/Write operations with the on-chip register locations.

Read Signal This active low input functions as the read signal from the local

µP. When this

pin is pulled “Low” (if CS is “Low”) the LIU is informed that a read operation has been

requested and begins the process of the read cycle.

Write Signal This active low input functions as the write signal from the local

µP. When this

pin is pulled “Low” (if CS is “Low”) the LIU is informed that a write operation has been

requested and begins the process of the write cycle.

RDY

Ready Output This active low signal is provided by the LIU device. It indicates that the cur-

rent read or write cycle is complete, and the LIU is waiting for the next command.

INT

Interrupt Output This active low signal is provided by the LIU to alert the local mP that a

change in alarm status has occured. This pin is Reset Upon Read (RUR) once the alarm sta-

tus registers have been cleared.

RESET

Reset Input This active low input pin is used to Reset the LIU.

XRT75R06DIB bảng dữ liệu(PDF) 49 Page - Exar Corporation

XRT75R06DIB bảng dữ liệu(HTML) 49 Page - Exar Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

bảng dữ liệu tải về

Link URL