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| 型號(hào)： | XRT94L31IB-L |
| 廠商： | Exar Corporation |
| 文件頁(yè)數(shù)： | 98/133頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC MAPPER DS3/E3/STS-1 504TBGA |
| 標(biāo)準(zhǔn)包裝： | 24 |
| 應(yīng)用： | 網(wǎng)絡(luò)切換 |
| 接口： | 總線 |
| 電源電壓： | 3.14 V ~ 3.47 V |
| 封裝/外殼： | 504-LBGA |
| 供應(yīng)商設(shè)備封裝： | 504-TBGA（35x35） |
| 包裝： | 托盤 |
| 安裝類型： | 表面貼裝 |
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XRT94L31
67
REV. 1.0.1
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC
B15
C23
AG13
RxOH_0
RxOH_1
RxOH_2
O
CMOS
Receive Overhead Data Output Interface - output
This output pin functions as the Receive Overhead Data output for the
receive system side interface when the XRT94L31 is configured to oper-
ate in DS3/E3 mode, however, it functions as the Receive STS-1 Over-
head Data output when the device is configured to operate in the STS-1
mode.
When configured to operate in DS3/E3 mode:
All overhead bits, which are received via the Receive Section of the
channel, will be output via this output pin, upon the rising edge of
RxOHClk_n.
When configured to operate in STS-1 mode:
These output pins, along with RxOHEnable_n, RxOHClk_n and
RxOHFrame_n function as the Receive STS-1 TOH and POH Output
Port.Each bit, within the TOH and POH bytes (within the incoming STS-1
data stream) is updated upon the falling edge of RxOHClk_n. As a con-
sequence, external circuitry receiving this data, should sample this data
upon the rising edge of RxOHClk_n.
NOTES:
1. The external circuitry can determine whether or not it is
receiving POH or TOH data via this output pin.
The
RxOHEnable_n output pin will be "High" anytime POH data is
being output via these output pins.
Conversely, the
RxOHEnable_n output pin will be "Low" anytime TOH data is
being output via these output pins.
2. TOH and POH data, associated with Receive STS-1 TOH and
POH Processor Block - Channel 0 will be output via the
RxOH_0, and so on.
C15
D21
AF13
RxOHENABLE_0
RxOHENABLE_1
RxOHENABLE_2
O
CMOS
Receive Overhead Data Output Interface - Enable Output
This output pin functions as the Receive Overhead Enable output for the
receive system side interface when the XRT94L31 is configured to oper-
ate in DS3/E3 mode, however, it functions as the Receive STS-1 Over-
head Data output when the device is configured to operate in the STS-1
mode.
When configured to operate in DS3/E3 mode:
The channel will assert this output signal for one RxOHClk_n period
when it is safe for the local terminal equipment to sample the data on the
RxOH_n output pin.
When configured to operate in STS-1 mode:
These output pins, along with RxOHClk_n, RxOHFrame_n and RxOH_n
function as the Receive STS-1 TOH and POH Output Port.
These output pins indicate whether POH or TOH data is being output via
the RxOH_n output pins.
These output pins will toggle "High" coincident with when POH data is
being output via the RxOH_n output pins. Conversely, these output pins
will toggle "Low" coincident with when TOH data is being output via the
RxOH_n output pins.
These output pins are updated upon the falling edge of RxOHClk_n. As
a consequence, external circuitry, receiving this data, should sample this
data upon the rising edge of RxOHClk_n.
PIN DESCRIPTION OF THE XRT94L31 (REV. B)
PIN #
SIGNAL NAME
I/O
TYPE
DESCRIPTION
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| XRT94L33 | 制造商:EXAR 制造商全稱:EXAR 功能描述:-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER - SONET REGISTERS |
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| XRT94L33_1 | 制造商:EXAR 制造商全稱:EXAR 功能描述:3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER ATM/PPP - HARWARE MANUAL |
| XRT94L33_2 | 制造商:EXAR 制造商全稱:EXAR 功能描述:3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER - SDH REGISTERS |
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