SAA7154E/V2/G,518 NXP Semiconductors, SAA7154E/V2/G,518 Datasheet - Page 76
SAA7154E/V2/G,518
Manufacturer Part Number
SAA7154E/V2/G,518
Description
Manufacturer
NXP Semiconductors
Datasheet
1.SAA7154EV2G518.pdf
(90 pages)
Specifications of SAA7154E/V2/G,518
Adc/dac Resolution
10b
Screening Level
Commercial
Package Type
LBGA
Pin Count
156
Lead Free Status / RoHS Status
Compliant
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NXP Semiconductors
SAA7154E_SAA7154H_2
Product data sheet
12.1.1 Initialization of boundary scan circuit
12.1.2 Device identification codes
Table 45.
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_N pin to 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.
When the IDCODE instruction is loaded into the BST instruction register, the identification
register will be connected between TDI and TDO of the IC. The identification register will
load a component specific code during the CAPTURE_DATA_REGISTER state of the TAP
controller and this code can subsequently be shifted out. At board level this code can be
used to verify component manufacturer, type and version number. The device
identification register contains 32 bits, numbered 31 to 0, where bit 31 is the most
significant bit (closest to TDI) and bit 0 is the least significant bit (closest to TDO);
see
Instruction
SAMPLE
CLAMP
IDCODE
Fig 25. 32 bits of identification code
Figure
TDI
BST instructions supported by the SAA7154E; SAA7154H
25.
Description
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.
31
MSB
version
nnnn
code
4-bit
28 27
Rev. 02 — 6 December 2007
0110 0011 0001 1001
16-bit part number
SAA7154E; SAA7154H
Multistandard video decoder with comb filter
12 11
11-bit manufacturer
0000 0010 101
identification
…continued
1
LSB
© NXP B.V. 2007. All rights reserved.
1
001aab946
0
TDO
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