參數(shù)資料
型號： DS21554LN
廠商： DALLAS SEMICONDUCTOR
元件分類： Digital Transmission Interface
英文描述： DATACOM, PCM TRANSCEIVER, PQFP100
封裝： 14 X 14 MM, LQFP-100
文件頁數(shù)： 69/117頁
文件大?。?/td> 698K
代理商： DS21554LN
DS21354 & DS21554
55 of 117
When the appropriate bits are set to a one, the RCHBLK and TCHBLK pin will be held high during the
entire corresponding channel time. See the timing in Section 19 for an example. The TCBRs have
alternate mode of use. Via the CCR3.6 bit, the user has the option to use the TCBRs to determine on a
channel by channel basis, which signaling bits are to be inserted via the TSRs (the corresponding bit in
the TCBRs = 1) and which are to be sourced from the TSER or TSIG pins (the corresponding bit in the
TCBR = 0). See the timing in Section 19.2 for an example.
RCBR1/RCBR2/RCBR3/RCBR4: RECEIVE CHANNEL BLOCKING
REGISTERS (Address=2B to 2E Hex)
(MSB)
(LSB)
CH8
CH7
CH6
CH5
CH4
CH3
CH2
CH1
RCBR1 (2B)
CH16
CH15
CH14
CH13
CH12
CH11
CH10
CH9
RCBR2 (2C)
CH24
CH23
CH22
CH21
CH20
CH19
CH18
CH17
RCBR3 (2D)
CH32
CH31
CH30
CH29
CH28
CH27
CH26
CH25
RCBR4 (2E)
SYMBOLS
POSITIONS
NAME AND DESCRIPTION
CH1 - 32
RCBR1.0 - 4.7 Receive Channel Blocking Control Bits.
0 = force the RCHBLK pin to remain low during this channel time
1 = force the RCHBLK pin high during this channel time
TCBR1/TCBR2/TCBR3/TCBR4: TRANSMIT CHANNEL BLOCKING
REGISTERS (Address=22 to 25 Hex)
(MSB)
(LSB)
CH8
CH7
CH6
CH5
CH4
CH3
CH2
CH1
TCBR1 (22)
CH16
CH15
CH14
CH13
CH12
CH11
CH10
CH9
TCBR2 (23)
CH24
CH23
CH22
CH21
CH20
CH19
CH18
CH17
TCBR3 (24)
CH32
CH31
CH30
CH29
CH28
CH27
CH26
CH25
TCBR4 (25)
SYMBOLS
POSITIONS
NAME AND DESCRIPTION
CH1 - 32
TCBR1.0 - 4.7
Transmit Channel Blocking Control Bits.
0 = force the TCHBLK pin to remain low during this channel time
1 = force the TCHBLK pin high during this channel time
NOTE:
If CCR3.6 = 1, then a zero in the TCBRs implies that signaling data is to be sourced from TSER (or TSIG
if CCR3.2 = 1) and a one implies that signaling data for that channel is to be sourced from the Transmit
Signaling (TS) registers. In this mode, the Voice Channel numbering scheme (CH1 – CH30) is used. See
definition below.
TCBR1/TCBR2/TCBR3/TCBR4: DEFINITION WHEN CCR3.6=1
(MSB)
(LSB)
CH18
CH3
CH17
CH2
CH16
CH1
1*
TCBR1(22)
CH22
CH7
CH21
CH6
CH20
CH5
CH19
CH4
TCBR2(23)
CH26
CH11
CH25
CH10
CH24
CH9
CH23
CH8
TCBR3(24)
CH30
CH15
CH29
CH14
CH28
CH13
CH27
CH12
TCBR4(25)
* these bits should be set to one to allow the internal TS1 register to create the CAS Multiframe
Alignment Word and Spare/Remote Alarm bits.
相關(guān)PDF資料
PDF描述
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