cn8237 Mindspeed Technologies, cn8237 Datasheet - Page 385

• Manufacturer Part Number: cn8237
• Description: Atm Oc-12 Servicesar Plus With Xbr Traffic Management
• Manufacturer: Mindspeed Technologies

CN8237
ATM OC-12 ServiceSAR Plus with xBR Traffic Management
Table A-2. IEEE Std. 1149.1 Instructions
28237-DSH-001-C
Bit 2
0
0
0
0
1
1
1
1
Bit 1
0
0
1
1
0
0
1
1
A.1 Instruction Register
The Instruction register is a 3-bit register with no parity. When the boundary scan
circuitry is reset, the IR is loaded with the binary value b111, which is equivalent
to the BYPASS Instruction value. The Capture-IR binary value is b001 and is
shifted out TDO as the IR is loaded.
(BYPASS, EXTEST, and SAMPLE/PRELOAD) and five private instructions for
manufacturing use only. Bit-0 (LSB) is shifted into the instruction register first.
Table A-2
NOTE:
A.2 BYPASS Register
The BYPASS register is a 1-bit shift register used to pass TDI data to TDO to
facilitate the testing of other devices in the scan path without having to shift the
data patterns through the complete Boundary Scan register of the CN8237.
A.3 Boundary Scan Register
The Boundary Scan register consists of two different types of registers
corresponding to IEEE Std. 1149.1a-1993 attributes and definitions. These register
names are STD_1149_1_1993 Standard Boundary Cell names BC-1 and BC-7.
Bit 0
0
1
0
1
0
1
0
1
The 16 instructions include three IEEE 1149.1 mandatory public instructions
The implementation of this register as described is applicable only to
Rev. A of the CN8237 device.
Mindspeed Technologies
shows the bit settings for this register.
EXTEST
SAMPLE/PRELOAD
IDCODE–Device ID
RSTHIGH–Private
HIGH2–Private
RUNBIST–Private
RSVD1–Private
BYPASS
Instruction
™
Appendix A : Boundary Scan
Register Accessed
Boundary Scan
Boundary Scan
Device ID
A.1 Instruction Register
Bypass
—
—
—
—
A-3