參數(shù)資料
型號： DS21FT42
元件分類： 通信及網(wǎng)絡(luò)
英文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁數(shù)： 43/145頁
文件大?。?/td> 466K
代理商： DS21FT42
DALLAS SEMICONDUCTOR
DS21FF42/DS21FT42
101899
/1233
(MSB)
RJC
(LSB)
RCM0
RESALGN
TESALGN
RCM4
RCM3
RCM2
RCM1
SYMBOL
POSITION
NAME AND DESCRIPTION
RJC
CCR6.7
Receive Japanese CRC6 Enable.
0 = use ANSI/AT&T/ITU CRC6 calculation (normal operation)
1 = use Japanese standard JT–G704 CRC6 calculation
Receive Elastic Store Align.
Setting this bit from a zero to a one may
force the receive elastic store’s write/read pointers to a minimum
separation of half a frame. No action will be taken if the pointer
separation is already greater or equal to half a frame. If pointer
separation is less then half a frame, the command will be executed
and data will be disrupted. Should be toggled after RSYSCLK has been
applied and is stable. Must be cleared and set again for a subsequent
align. See Section 17 for details.
Transmit Elastic Store Align.
Setting this bit from a zero to a one
may force the transmit elastic store’s write/read pointers to a
minimum separation of half a frame. No action will be taken if the
pointer separation is already greater or equal to half a frame. If
pointer separation is less then half a frame, the command will be
executed and data will be disrupted. Should be toggled after
TSYSCLK has been applied and is stable. Must be cleared and set
again for a subsequent align. See Section 17 for details.
Receive Channel Monitor Bit 4.
MSB of a channel decode that
determines which receive channel data will appear in the RDS0M
register. See Section 13 for details.
Receive Channel Monitor Bit 3.
Receive Channel Monitor Bit 2.
Receive Channel Monitor Bit 1.
Receive Channel Monitor Bit 0
. LSB of the channel decode.
RESALGN
CCR6.6
TESALGN
CCR6.5
RCM4
CCR6.4
RCM3
RCM2
RCM1
RCM0
CCR6.3
CCR6.2
CCR6.1
CCR6.0
CCR7: COMMON CONTROL REGISTER 7
(Address=0A Hex)
(MSB)
–
(LSB)
–
RLB
RESR
TESR
–
–
–
SYMBOL
–
RLB
POSITION
CCR7.7
CCR7.6
NAME AND DESCRIPTION
Not Assigned.
Should be set to zero when written to.
Remote Loopback.
0 = loopback disabled
1 = loopback enabled
Receive Elastic Store Reset.
Setting this bit from a zero to a one will
force the receive elastic store to a depth of one frame. Receive data is
lost during the reset. Should be toggled after RSYSCLK has been
applied and is stable. Do not leave this bit set high.
RESR
CCR7.5
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