NSK70721PE.C2 Intel, NSK70721PE.C2 Datasheet - Page 15

• Manufacturer Part Number: NSK70721PE.C2
• Manufacturer: Intel

Specifications of NSK70721PE.C2

• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.75V
• Operating Supply Voltage (max): 5.25V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 28
• Lead Free Status / RoHS Status: Supplier Unconfirmed

Control Mode
Datasheet
1. This input is a Schmidt Triggered circuit and includes an internal pull-up device.
2. This input is a Schmidt Triggered circuit and includes an internal pull-down device.
3. This input includes an internal pull-up device.
4. This input includes an internal pull-down device.
5. I/O column entries: DI = Digital Input; DO = Digital Output; DI/O = Digital Input/Output; AI = Analog Input; AO = Analog Output;
Description
(Hardware
Hardware
Interface
AI/O = Analog Input/Output; S = Supply.
Group
Signal
Table 2. EDSP Pin Assignments/Signal Descriptions (Continued)
only)
Pin #
32
33
34
35
36
37
38
39
40
41
43
DEACTVTD
TMR_EXP
HWSEL1
HWSEL2
HWSEL3
Symbol
TXTST
RPTR
FELB
BELB
ILMT
LOS
Enhanced Multi-Rate DSL Data Pump Chip Set — SK70725/SK70721
I/O
DO
DI
DI
DI
DO
DO
DI
DI
DI
DI
DI
2
2
2
1
1
1
1
1
5
Timer Expiration Indicator. TMR_EXP goes high when the Master Activation
Timer (MAT) expires.
HW Select1.
HW Select2.
HW Select3.
Loss of Signal Indicator. LOS goes high when the EMDP is in the Inactive
state.
Deactivation Indicator. DEACTVTD is high when the Data Pump is in the
Deactivated state.
Insertion Loss Measurement Test. Set high to transmit a scrambled all 1’s
signal. In operating mode 6 and 7 the signals transmitted are framed with valid
sync word, whereas in the rest of the operating modes signals transmitted are
unframed without any sync word. If the loop is connected to a Slave Data Pump
then it may begin activating. Must be asserted only from the Inactive state of the
Data Pump.
Repeater Mode Enable. (operating mode 6 & 7 only). When in Master mode,
setting RPTR high configures the Data Pump to derive timing from the
MSTR_CLK output of an adjacent device for transparent repeater applications.
The BIT_CLK output phase is aligned to the TFP input pulse. RPTR is ignored in
Slave mode.
Front-End Loopback (Master only). In the Inactive state, set high to cause the
IAFE to loopback. The RTIP/RRING inputs are disconnected and only the
signals on the BTIP/BRING inputs are processed.
Back-End Loopback. Set BELB high in Active1 or Active2 state to force an
internal loopback with RDATA connected to TDATA and RFP connected to TFP.
Transmit Test. Set high to enable isolated transmit pulse generation. TDATA
controls the sign and TFP controls the magnitude of the transmitted pulses
according to the 2B1Q encoding rules described in
is available only in framed modes 6 and 7. In framed mode 6 the pulses are
transmitted every 7006/7010 BIT_CLK cycles, corresponding to the ETSI
framing sequence. In framed mode 7 the pulses are transmitted every 4702/
4706 BIT_CLK cycles. TXTST is available only when the Data Pumps are
Inactive.
Each of these three pins must be low to enable Hardware
Control Mode. When any of them is high, the EDSP reverts
immediately to Software Control Mode.
Description
Table
3. The TXTST function
15