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參數(shù)資料
| 型號： | T7121-PL2 |
| 英文描述： | T7121 HDLC Interface for ISDN |
| 中文描述： | T7121的HDLC接口用于ISDN |
| 文件頁數(shù)： | 42/68頁 |
| 文件大?。?/td> | 685K |
| 代理商： | T7121-PL2 |
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42
Lucent Technologies Inc.
Data Sheet
April 1997
T7121 HDLC Interface for ISDN (HIFI-64)
Functional Description
(continued)
Table 22. Register R13—Transmitter Mask Register
R13—B7
TBM7
(0)
R13—B6
TBM6
(0)
R13—B5
TBM5
(0)
R13—B4
TBM4
(0)
R13—B3
TBM3
(0)
R13—B2
TBM2
(0)
R13—B1
TBM1
(0)
R13—B0
TBM0
(0)
Register
R13
Bit
Symbol
TBM0—TBM7
Transmitter Time-Slot Bit Mask.
This register allows the HIFI-64 to
transmit some subset of each byte during a time slot. A 1 in each bit
position instructs the HIFI-64 to send valid data during each bit time
when it is the HIFI-64's turn on the highway. Placing a 0 in any bit posi-
tion instructs the HIFI-64 to 3-state the transmit pin(s) during that bit
time. For example, 00000000 (default) means 3-state during the entire
time slot, 11000000 means transmit the two most significant bits dur-
ing each time slot, and 11111111 transmits the entire byte. See Fig-
ures 8 and 9 for examples of bit masking and subrate operation.
Name/Function
B(0—7)
Default is all 0s so that the HIFI-64 does not transmit on the bus before
a time slot has been assigned.The masking feature is available only in
the TDM highway mode (i.e., HWYEN, R0—B7 = 1). TBM0 masks the
least significant bit transmitted (as defined by TLBIT, R10—B6).
Table 23. Alternate Register AR13—Transmitter Idle Character Register
AR13—B7
TIC7
(1)
AR13—B6
TIC6
(1)
AR13—B5
TIC5
(1)
AR13—B4
TIC4
(1)
AR13—B3
TIC3
(1)
AR13—B2
TIC2
(1)
AR13—B1
TIC1
(1)
AR13—B0
TIC0
(1)
Register
AR13
Bit
Symbol
TIC0—TIC7
Transmitter Idle Character.
This character is used only in transparent
mode (TRANS, R11—B6 = 1). When the pattern match bit (MATCH,
AR11—B5) is set to 1, the HIFI-64 transmits this character whenever the
transmit FIFO is empty. The default is to send the 1s idle character, but
any character can be programmed by the user.
Name/Function
B(0—7)
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PDF描述 |
|---|---|
| T7121 | HDLC Interface for ISDN (HIFI-64)(應(yīng)用于ISDN的HDLC（高階數(shù)據(jù)鏈路）接口) |
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| T7503 | T7503 Dual PCM Codec with Filters |
| T7504 | T7504 and T75504 Quad PCM Codecs with Filters |
| T7507 | T7507 Quad PCM Codec with Filters, Termination Impedance, and Hybrid Balance |
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|---|---|
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| T7-122D1 | 制造商:OTTO 功能描述:Toggle Switches (ON) NONE ON 1 Pole Low-Level Bat Handle 制造商:OTTO Engineering Inc 功能描述:Switch Toggle (ON) None ON SPDT Bat Toggle Screw 16A 115VAC 28VDC Panel Mount with Threads |
| T7-122E1 | 制造商:OTTO 功能描述:Toggle Switches (ON) OFF (ON) 1 Pole Low-Level Bat Handle 制造商:OTTO Engineering Inc 功能描述:Switch Toggle (ON) OFF (ON) SPDT Bat Toggle Screw 16A 115VAC 28VDC Panel Mount with Threads |
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