参数资料
型号: DS3131
厂商: MAXIM INTEGRATED PRODUCTS INC
元件分类: Telecom IC:Other
英文描述: SPECIALTY TELECOM CIRCUIT, PBGA256
封装: 27 X 27 MM, PLASTIC, BGA-256
文件页数: 63/174页
文件大小: 1261K
代理商: DS3131
DS3131
155 of 174
12.
JTAG
12.1 JTAG Description
The DS3131 supports the standard instruction codes SAMPLE/PRELOAD, BYPASS, and EXTEST.
Optional public instructions included are HIGHZ, CLAMP, and IDCODE. Figure 12-1 is a block
diagram. The DS3131 contains the following items, which meet the requirements set by the IEEE 1149.1
Standard Test Access Port and Boundary Scan Architecture:
Test Access Port (TAP)
TAP Controller
Instruction Register
Bypass Register
Boundary Scan Register
Device Identification Register
The TAP has the necessary interface pins JTCLK, JTRST, JTDI, JTDO, and JTMS. Details about these
pins can be found in Section 3.4. Refer to IEEE 1149.1-1990, IEEE 1149.1a-1993, and IEEE 1149.1b-
1994 for details about the Boundary Scan Architecture and the TAP.
Figure 12-1. Block Diagram
BOUNDARY
SCAN REGISTER
IDENTIFICATION
REGISTER
BYPASS
REGISTER
INSTRUCTION
REGISTER
TEST ACCESS PORT
CONTROLLER
MU
X
SELECT
THREE-STATE
JTDI
10k
JTMS
10k
JTCLK
JTRST
10k
JTDO
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