BT8370KPF

Manufacturer Part NumberBT8370KPF
DescriptionFully integrated T1/E1 framer and line interface
ManufacturerConexant Systems, Inc.
BT8370KPF datasheet
 


Specifications of BT8370KPF

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2.0 Circuit Description
2.12 Joint Test Access Group
2.12 Joint Test Access Group
The Bt8370/8375/8376 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 (see
(BSDL) file for the Bt8370/8375/8376 is available from the factory upon request.
The test access port consists of the TDI, TCK, TMS, and TDO pins. An
internal power on reset circuit resets the JTAG port.
Figure 2-49. JTAG Diagram
2.12.1 Instructions
In addition to the required BYPASS, SAMPLE/PRELOAD, and EXTEST
instructions, IDCODE instruction is supported. There are also two private
instructions.
Table 2-25. JTAG Instructions
2-88
Fully Integrated T1/E1 Framer and Line Interface
Figure
2-49). A Boundary Scan Description Language
TCK
TMS
JTAG Port
TDI
TDO
Table 2-25
lists the JTAG instructions, and their codes.
Instruction
BYPASS
SAMPLE/PRELOAD
EXTEST
IDCODE
Private
Private
Conexant
Bt8370/8375/8376
Code
111 111
000 001
000 000
000 010
xxx xxx
xxx xxx
N8370DSE