參數(shù)資料
型號: XRT75R12DIB
廠商: Exar Corporation
文件頁數(shù): 78/133頁
文件大?。?/td> 0K
描述: IC LIU E3/DS3/STS-1 12CH 420TBGA
標(biāo)準(zhǔn)包裝: 40
類型: 線路接口裝置(LIU)
驅(qū)動器/接收器數(shù): 12/12
規(guī)程: DS3,E3,STS-1
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 420-LBGA 裸露焊盤
供應(yīng)商設(shè)備封裝: 420-TBGA(35x35)
包裝: 托盤
XRT75R12D
45
REV. 1.0.3
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
7.0
MICROPROCESSOR INTERFACE BLOCK
The Microprocessor Interface section supports communication between the local microprocessor (P) and the
LIU. The XRT75R12D 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 inter-
face mode is shown in Table 13.
The local P configures the LIU by writing data into specific addressable, on-chip Read/Write registers. The
P provides the signals which are required for a general purpose microprocessor to read or write data into
these registers. The P also supports polled and interrupt driven environments. A simplified block diagram of
the microprocessor is shown in Figure 34.
TABLE 13: SELECTING THE MICROPROCESSOR INTERFACE MODE
PMODE
MICROPROCESSOR MODE
"Low"
Asynchronous Mode
"High"
Synchronous Mode
FIGURE 34. SIMPLIFIED BLOCK DIAGRAM OF THE MICROPROCESSOR INTERFACE BLOCK
Microprocessor
Interface
WR
RD
Pmode
RDY
RESET
PCLK
CS
INT
Addr[7:0]
D[7:0]
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