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參數(shù)資料
| 型號： | TP3420AV |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | ISDN S/T Interface Device |
| 中文描述： | DATACOM, DIGITAL SLIC, PQCC20 |
| 封裝： | PLASTIC, LCC-20 |
| 文件頁數(shù)： | 12/32頁 |
| 文件大?。?/td> | 524K |
| 代理商： | TP3420AV |
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Functional Description
(Continued)
TABLE 4. Control Register Functions
(Continued)
Function
Mnemonic
Bit Number
4
7
6
5
3
2
1
0
Control Device State Reading
Disable the Device State Output on the NOCST (Note 6)
Control of Additional Interrupts
Enable the Slip and RMFE Interrupts
Disable the Slip and RMFE Interrupts (Note 6)
Control Polarity of B Channel Data
Invert B1 Channel Data
Invert B2 Channel Data
Normal B1, B2 Data (Note 6)
Pin Signal Selection
Redefine Pin Signals (See Table 1)
DISST
1
0
0
1
0
0
1
1
ENINT
DISINT
1
1
0
0
0
0
1
1
0
0
1
1
0
0
0
1
INVB1
INVB2
NRMB12
1
1
1
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
0
1
1
1
0
1
PINDEF
1
1
1
0
0
x2
x1
x0
Note 6:
Indicates initial state following Power-on initialization.
Note 7:
Slave-slave mode.
Note 8:
DACCD is the power up default in TES mode and DACCE is the power up default in TEM mode.
TABLE 5. Status Register Functions
Function
Mnemonic
Bit Number
4
0
0
0
0
0
0
0
1
1
0
7
0
0
0
0
0
0
0
0
0
0
6
0
0
0
0
0
0
0
0
1
0
5
0
0
0
0
0
0
0
1
0
0
3
0
0
1
1
1
0
0
2
0
0
1
1
1
1
1
1
1
1
0
1
1
1
1
0
0
1
0
0
1
0
1
Line Signal Detected Far-End
Activation Pending
Activation Indication
Error Indication
Deactivation Indication
End of D-ch Tx Message
Lost Contention for D-ch
Multiframe Receiver Buffer 1 (SC1/Q)
Multiframe Receiver Buffer 2 (SC2)
Multiframe Clock (5 ms or 30 ms)
Additional Interrupts after ENINT Command
Receive Multiframe Error
Phase Slip in Data Buffer for Bx Data
Phase Slip in Data Buffer for Br Data
Phase Slip for Both Bx and Br Data
NO Change Return Status
NOC Status after DISST Command (Note
9)
NOC Status after ENST Command
See Table 6 for Device State Decoding
LSD
AP
AI
EI
DI
EOM
CON
MFR1
MFR2
MFC
M1
M1
0
M2
M2
1
M3
M3
0
M4
M4
0
RMFE
SLIP TX
SLIP RX
SLIP TX/RX
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
1
1
1
1
0
1
NOC
0
0
0
0
0
0
0
0
NOCST
1
S3
S2
S1
0
0
0
0
Note 9:
Indicates initial state following Power-on Initialization.
STATUS INDICATOR DESCRIPTIONS
LSD
This interrupt indicates that the far-end of the line
is attempting to Activate the interface. May be
used as an alternative to the LSD pin to “wake-up”
a microprocessor.
AP
If set, indicates that either INFO 1 frames have
been identified in an NT receiver, or INFO 2 or
INFO 4 frames have been identified in a TE re-
ceiver. Requires an AR control instruction to allow
Activation to be completed.
This interrupt occurs when the closing flag of a
D-channel message has been transmitted by a TE
on the S interface, indicating successful comple-
tion of a packet. The Interrupt associated with this
bit can be disabled via the Control Register if de-
sired.
This interrupt occurs when, during transmission of
EOM
CON
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