13. JTAG
138
Tsi384 User Manual
May 5, 2014
Integrated Device Technology
www.idt.com
— Bypass
— IDCODE
— Clamp
— User data select
13.2
TAP Controller Initialization
After power-up of the Tsi384, the TAP controller must be put into its test-logic-reset state to disable the
JTAG logic and allow the bridge to function normally. This can be completed by driving the
JTAG_TMS signal high and pulsing the JTAG_TCK signal five or more times, or by asserting the
JTAG_TRSTn signal.
13.3
Instruction Register
The Tsi384 uses an Instruction register to control the operation of the JTAG logic. Bit combinations
that are not equivalent to any instruction are equivalent to the BYPASS instruction.
13.4
Bypass Register
This register is a 1-bit shift register that provides a single bit scan path between the JTAG_TDI input
and the JTAG_TDO output. This abbreviated scan path is selected by the BYPASS instruction code,
and is used to shorten the overall scan ring length during board-level testing when the Tsi384 is not
involved.
13.5
JTAG Device ID Register
The JTAG device identification number for the Tsi384 is as follows:
•
Version [31:28] – 0010
•
Part number [27:12] – 0000_0011_1000_0100
•
Manufacturer identity [11:1] – 000_1011_0011
•
Mandatary LSB [0] – 1
Summary of Contents for TSI384
Page 1: ... IDT Tsi384 PCIe to PCI Bridge User Manual May 5 2014 ...
Page 10: ...Contents 10 Tsi384 User Manual May 5 2014 Integrated Device Technology www idt com ...
Page 56: ...4 Addressing 56 Tsi384 User Manual May 5 2014 Integrated Device Technology www idt com ...
Page 74: ...6 Bridging 74 Tsi384 User Manual May 5 2014 Integrated Device Technology www idt com ...
Page 78: ...7 PCI X Arbitration 78 Tsi384 User Manual May 5 2014 Integrated Device Technology www idt com ...
Page 136: ...12 Serial EEPROM 136 Tsi384 User Manual May 5 2014 Integrated Device Technology www idt com ...
Page 142: ...13 JTAG 142 Tsi384 User Manual May 5 2014 Integrated Device Technology www idt com ...
Page 268: ...16 Packaging 268 Tsi384 User Manual May 5 2014 Integrated Device Technology www idt com ...
Page 276: ...276 Tsi384 User Manual May 5 2014 Integrated Device Technology www idt com ...
Page 280: ...Index 280 Tsi384 User Manual May 5 2014 Integrated Device Technology www idt com ...