bt848kpf ETC-unknow, bt848kpf Datasheet - Page 88

• Manufacturer Part Number: bt848kpf
• Description: Single-chip Video Capture For Pci
• Manufacturer: ETC-unknow

E
JTAG Interface
78
LECTRICAL
Verification with the Tap
Optional Device ID
I
NTERFACES
Controller
Register
The Bt848 has the optional device identification register defined by the JTAG spec-
ification. This register contains information concerning the revision, actual part
number, and manufacturers identification code specific to Brooktree. This register
can be accessed through the TAP controller via an optional JTAG instruction. Re-
fer to Table 15.
Table 15. Device Identification Register
A variety of verification procedures can be performed through the TAP controller.
With a set of four instructions, the Bt848 can verify board connectivity at all digital
interfaces and pins. The instructions are accessible by using a state machine stan-
dard to all JTAG controllers and are: Sample/Preload, Extest, ID Code, and Bypass
(see Figure 37). Refer to the IEEE P1149.1 specification for details concerning the
Instruction Register and JTAG state machine.
ing be implemented, a disk with an ASCII version of the complete BSDL file may
be obtained by calling 1-800-2Bt Apps.
NOTE:
Figure 37. Instruction Register
X X X X 0 0 0 0 0 0 1 1 0 1 0 1 0 0 0 0 0 0 0 1 1 0 1 0 1 1 0 1
Version
4 Bits
Brooktree has created a BSDL with the AT&T BSD Editor. Should JTAG test-
0
Not all PCs drive the PCI bus TRST pin. In these computers, if the TRST
pin on the Bt848 board is connected to TRST on the PCI bus (which is not
driven) there is a potential that the Bt848 may power-up in an undefined
state. In these designs the TRST pin on the Bt848 must be grounded (dis-
abling JTAG).
TDI
L848A_A
Part Number
0848, 0x0350
16 Bits
EXTEST
Sample/Preload
ID Code
Bypass
Single-Chip Video Capture for PCI
Manufacturer ID
11 Bits
0x0D6
Bt848/848A/849A
0
0
0
1
TDO
Brooktree
®