FWIXEPAD0SE001 INTEL [Intel Corporation], FWIXEPAD0SE001 Datasheet - Page 157
FWIXEPAD0SE001
Manufacturer Part Number
FWIXEPAD0SE001
Description
Advanced 8-Port 10/100 Mbps PHY Transceivers
Manufacturer
INTEL [Intel Corporation]
Datasheet
1.FWIXEPAD0SE001.pdf
(226 pages)
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4.12.4
4.12.5
4.12.6
4.12.7
Datasheet
Document Number: 249241
Revision Number: 007
Revision Date: August 28, 2003
Table 48. BSR Mode of Operation
Table 49. Supported JTAG Instructions
The LXT9785/LXT9785E includes an IEEE 1149.1 boundary scan test port for board level testing.
All digital input, output, and input/output pins are accessible.
Boundary Scan Interface
This interface consists of five pins (TMS, TDI, TDO, TCK and TRST). It includes a state machine,
data register array, and instruction register. The TMS and TDI pins are internally pulled up and the
TCK pin is internally pulled down. TDO does not have an internal pull-up or pull-down.
State Machine
The TAP controller is a 16-state machine driven by the TCK and TMS pins. Upon reset, the
TEST_LOGIC_RESET state is entered. The state machine is also reset when TMS and TDI are
High for five TCK periods.
Instruction Register
The IDCODE instruction is always invoked after the state machine resets. The decode logic
ensures the correct data flow to the Data registers according to the current instruction. Valid
instructions are listed in
Boundary Scan Register
Each Boundary Scan Register (BSR) cell has two stages. A flip-flop and a latch are used for the
serial shift stage and the parallel output stage. There are four modes of operation as listed in
Table
Update (document number 249357) for the JTAG ID numbers.
EXTEST
IDCODE
SAMPLE
High Z
Clamp
BYPASS
Mode
Name
1
2
3
4
48. Refer to the Identification Information section in the LXT9785/LXT9785E Specification
LXT9785 and LXT9785E Advanced 8-Port 10/100 Mbps PHY Transceivers
0000 Hex
FFFE Hex
FFF8 Hex
FFCF Hex
FFEF Hex
FFFF Hex
Code
Table
System Function
Description
Capture
Update
49.
Shift
External Test
ID Code Inspection
Sample Boundary
Force Float
Clamp
Bypass Scan
Description
BSR
ID REG
BSR
Bypass
BSR
Bypass
Register
Data
159
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