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參數資料
型號: 1215E
英文描述: TEST/JTAG SUPPORT|CMOS|QFP|48PIN|PLASTIC
中文描述: 測試/ JTAG支持|的CMOS | QFP封裝| 48PIN |塑料
文件頁數: 53/92頁
文件大小: 1041K
代理商: 1215E
Agere Systems Inc.
57
User Manual
April 2001
Advanced Operational Mode
497AE and 1215E Boundary-Scan Master 2
Appendix B—BSM2 Register Descriptions (continued)
IDLE: IDLE Counter Register
Purpose
Provides capability to fix a period for the TAP Controllers of the selected/attached B-S chain to be held in a defined
Idle TAP Controller state. Used in normal scan operation. See under the heading Defining TAP Controller States in
a Scan Sequence.
Addresses (Octal)
15—14
Format
Default (Hex)
IDLE = 00000000
Read-only Bits
None
Description
The IDLE counter specifies the number of cycles of the clock signal on TCK in which the TAP Controllers of a
selected/attached B-S chain will remain in a predetermined idle state. The period is determined by a downcount to
0 from the value written to the IDLE counter register. The precise count in the idle state is n + 1, where n is the
value programmed in this register. (Note: a programmed count of 1 will result in an operational idle count of 2. An
operational idle count of 1 is not allowed as a programmed count of 0 implies no idle state.)
The TAP Controller state in which the downcount will occur is encoded by the value of the IDT[1:0] bits in the CSC
register. If the programmed scan operation involves a sequence of TAP Controller states not including the Idle TAP
Controller state defined in the IDT[1:0] bits, no downcount will occur regardless of the value in the IDLE counter
register.
A common use of the IDLE counter is to specify the amount of time the BSM2 should wait in the Run-Test/Idle TAP
Controller state while some BIST activated via the B-S chain runs to completion. Another application occurs during
the programming of devices via the B-S chain. For example, a device may be designed such that the burn-in time
must occur when the device’s TAP Controller is in its Pause-IR TAP Controller state. The IDLE counter would be
used to maintain the TAP Controller state for a time
≥ the burn-in time.
If an operational mode is selected where the scan type and idle type are the same, both counters run simulta-
neously. The state is exited when the maximum count reaches zero.
31—00
IDLE[31:0]
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參數描述
1215-EN 制造商:Thomas & Betts 功能描述:INSERT BUSHING--2
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1215F2 功能描述:BATT PK 3.0V AA SIZE CARBON ZINC RoHS:否 類別:電池產品 >> 電池組 系列:Eveready® MSDS 材料安全數據表:Nickel Cadmium Battery MSDS 標準包裝:1 系列:Cadnica 電池化學:鎳鎘 可充電:是 電池大小:D 單元數:10 電壓 - 額定:12V 容量:4Ah 結構:正面至背面,5 排 x 2 芯電池 端接類型:焊片 尺寸/尺寸:6.42" L x 1.28" W x 4.63" H(163.0mm x 32.6mm x 117.6mm) 重量:3.5 磅(1.6kg) 請注意:- 配用:SY125-ND - BATT NICAD 1.2V D 4000MAH 其它名稱:SY125-L025
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