SAA7114HV2 NXP Semiconductors, SAA7114HV2 Datasheet - Page 134
SAA7114HV2
Manufacturer Part Number
SAA7114HV2
Description
Manufacturer
NXP Semiconductors
Datasheet
1.SAA7114HV2.pdf
(144 pages)
Specifications of SAA7114HV2
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Philips Semiconductors
16. Test information
SAA7114_3
Product data sheet
16.1.1 Initialization of boundary scan circuit
16.1.2 Device identification codes
16.1 Boundary scan test
The SAA7114 has built-in logic and 5 dedicated pins to support boundary scan testing
which allows board testing without special hardware (nails). The SAA7114 follows the
“IEEE Std. 1149.1 - Standard Test Access Port and Boundary-Scan Architecture” set by
the Joint Test Action Group (JTAG) chaired by Philips.
The 5 special pins are Test Mode Select (TMS), Test Clock (TCK), Test Reset (TRST),
Test Data Input (TDI) and Test Data Output (TDO).
The Boundary Scan Test (BST) functions BYPASS, EXTEST, SAMPLE, CLAMP and
IDCODE are all supported; see
found in specification “IEEE Std. 1149.1” . A file containing the detailed Boundary Scan
Description Language (BSDL) description of the SAA7114 is available on request.
Table 136: BST instructions supported by the SAA7114
The Test Access Port (TAP) controller of an IC should be in the reset state
(TEST_LOGIC_RESET) when the IC is in functional mode. This reset state also forces
the instruction register into a functional instruction such as IDCODE or BYPASS.
To solve the power-up reset, the standard specifies that the TAP controller will be forced
asynchronously to the TEST_LOGIC_RESET state by setting the TRST pin LOW.
A device identification register is specified in “IEEE Std. 1149.1b-1994” . It is a 32-bit
register which contains fields for the specification of the IC manufacturer, the IC part
number and the IC version number. Its biggest advantage is the possibility to check for the
correct ICs mounted after production and determination of the version number of ICs
during field service.
Instruction
BYPASS
EXTEST
SAMPLE
CLAMP
IDCODE
Description
This mandatory instruction provides a minimum length serial path (1 bit) between
TDI and TDO when no test operation of the component is required.
This mandatory instruction allows testing of off-chip circuitry and board level
interconnections.
This mandatory instruction can be used to take a sample of the inputs during
normal operation of the component. It can also be used to preload data values into
the latched outputs of the boundary scan register.
This optional instruction is useful for testing when not all ICs have BST. This
instruction addresses the bypass register while the boundary scan register is in
external test mode.
This optional instruction will provide information on the components manufacturer,
part number and version number.
Rev. 03 — 17 January 2006
Table
136. Details about the JTAG BST-TEST can be
PAL/NTSC/SECAM video decoder
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
SAA7114
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