参数资料
型号: DS21FF44N
厂商: DALLAS SEMICONDUCTOR
元件分类: Digital Transmission Controller
英文描述: DATACOM, FRAMER, PBGA300
封装: 27 X 27 MM, BGA-300
文件页数: 44/110页
文件大小: 526K
代理商: DS21FF44N
DS21FT44/DS21FF44
39 of 110
SYMBOL
POSITION
NAME AND DESCRIPTION
THSE
CCR3.2
Transmit Side Hardware Signaling Insertion Enable. See
Section 14 for details.
0=do not insert signaling from the TSIG pin into the data
stream presented at the TSER pin
1=insert signaling from the TSIG pin into the data stream
presented at the TSER pin
TBCS
CCR3.1
Transmit Side Backplane Clock Select.
0=if TSYSCLK is 1.544 MHz
1=if TSYSCLK is 2.048 MHz
RCLA
CCR3.0
Receive Carrier Loss (RCL) Alternate Criteria.
0=RCL declared upon 255 consecutive zeros (125 us)
1=RCL declared upon 2048 consecutive zeros (1 ms)
CCR4: COMMON CONTROL REGISTER 4 (Address=A8 Hex)
(MSB)
(LSB)
RLB
TCM4
TCM3
TCM2
TCM1
TCM0
SYMBOL
POSITION
NAME AND DESCRIPTION
RLB
CCR4.7
Remote Loopback.
0 = loopback disabled
1 = loopback enabled
CCR4.6
Not Assigned. Should be set to zero when written.
CCR4.5
Not Assigned. Should be set to zero when written.
TCM4
CCR4.4
Transmit Channel Monitor Bit 4. MSB of a channel decode
that deter-mines which transmit channel data will appear in the
TDS0M register. See Section 13 or details.
TCM3
CCR4.3
Transmit Channel Monitor Bit 3.
TCM2
CCR4.2
Transmit Channel Monitor Bit 2.
TCM1
CCR4.1
Transmit Channel Monitor Bit 1.
TCM0
CCR4.0
Transmit Channel Monitor Bit 0. LSB of the channel
decode.
CCR5: COMMON CONTROL REGISTER 5 (Address = AA Hex)
(MSB)
(LSB)
RESALGN
TESALGN
RCM4
RCM3
RCM2
RCM1
RCM0
SYMBOL
POSITION
NAME AND DESCRIPTION
CCR5.7
Not Assigned. Should be set to zero when written
RESALGN
CCR5.6
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.
相关PDF资料
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