cx28380 Mindspeed Technologies, cx28380 Datasheet - Page 44
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cx28380
Manufacturer Part Number
cx28380
Description
Cn8380 Quad T1/e1 Line Interface
Manufacturer
Mindspeed Technologies
Datasheet
1.CX28380.pdf
(86 pages)
Available stocks
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Part Number
Manufacturer
Quantity
Price
Part Number:
cx28380-16
Manufacturer:
MINDSPEED
Quantity:
20 000
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Figure 2-2. Jitter Transfer 3 dB Point Versus LFGAIN and RSCALE/VSCALE for E1
NOTE:
2.8
The CX28380 incorporates printed circuit board testability circuits in compliance with IEEE Std. P1149.1a–1993,
IEEE Standard Test Access Port and Boundary–Scan Architecture, commonly known as JTAG (Joint Test Action
Group).
The JTAG includes a test access port (TAP) and several data registers. The TAP provides a standard interface
through which instructions and test data are communicated. A Boundary Scan Description Language (BSDL) file
for the CX28380 is available from the factory upon request.
The test access port consists of the TRST , TDI, TCK, TMS, and TDO pins. An internal power-on reset circuit or the
TRST
29380-DSH-001-B
resets the JTAG port.
-110.00
-130.00
RVSCALE means RSCALE and VSCALE. For example, RVSCALE = 128 means that RSCALE = 128 and VSCALE = 128.
-10.00
-30.00
-50.00
-70.00
-90.00
-110.00
-130.00
-10.00
-30.00
-50.00
-70.00
-90.00
1
1
Test Access Port (JTAG)
Preliminary Information / Mindspeed Proprietary and Confidential
Mindspeed Technologies
E1-3dB, RSCALE=1,VSCALE=1
E1_3dB, LFGAIN=1
Frequency (Hz)
Gain (dB)
®
1000
1000
Circuit Description
LFGAIN=1
LFGAIN=8
LFGAIN=512
RVSCALE=1
RVSCALE=4
RVSCALE=128
36
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