CN8380EPF CONEXANT [Conexant Systems, Inc], CN8380EPF Datasheet - Page 51

• Manufacturer Part Number: CN8380EPF
• Description: integrated quad line interface unit unit for both 1.544 Mbps (T1) and 2.048 Mbps (E1) applications
• Manufacturer: CONEXANT [Conexant Systems, Inc]

CN8380
Quad T1/E1 Line Interface
2.8.1 Instructions
2.8.2 Device Identification Register
Table 2-14. Device Identification JTAG Register
N8380DSA
0
Version
4 Bits
0
0x0
0
0
1
0 0 0 0 0
2.8 Test Access Port (JTAG)
The CN8380 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).
TAP provides a standard interface through which instructions and test data are
communicated. A Boundary Scan Description Language (BSDL) file for the
CN8380 is available from the factory upon request.
internal power on reset circuit or the
In addition to the required BYPASS, SAMPLE/PRELOAD, and EXTEST
instructions, IDCODE instruction is supported. There are also two private
instructions.
Table 2-13. JTAG Instructions
The JTAG ID register consists of a 4-bit version, a 16-bit part number, and an
11-bit manufacturer number as listed in
BYPASS
SAMPLE/PRELOAD
EXTEST
IDCODE
The JTAG includes a test access port (TAP) and several data registers. The
The test access port consists of the
Part Number
1 1 1 0 0 0 0 0 0
0x8380
16 Bits
Instructions
Table 2-13
Advance Information
Conexant
lists the JTAG instructions and their codes.
TRST
0 0
TRST
Table
resets the JTAG port.
, TDI, TCK, TMS, and TDO pins. An
0
2-14.
0
1
Manufacturer ID
1
11 Bits
0x0D6
Code
1111
0001
0000
0010
2.8 Test Access Port (JTAG)
0
2.0 Circuit Description
1
0
1
1
0
2-29
1