- 您现在的位置：买卖IC网 > PDF目录68777 > 1215E TEST/JTAG SUPPORT|CMOS|QFP|48PIN|PLASTIC PDF资料下载
参数资料
| 型号： | 1215E |
| 英文描述： | TEST/JTAG SUPPORT|CMOS|QFP|48PIN|PLASTIC |
| 中文描述： | 测试/ JTAG支持|的CMOS | QFP封装| 48PIN |塑料 |
| 文件页数： | 4/92页 |
| 文件大小： | 1041K |
| 代理商： | 1215E |
第1页第2页第3页当前第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页
12
Agere Systems Inc.
User Manual
April 2001
Advanced Operational Mode
497AE and 1215E Boundary-Scan Master 2
The BSM2 Scan Process (continued)
Writing, Reading, and Operation of the Input
and Output Scan Data FIFOs (TVI and TVO)
(continued)
Prior to execution, the user may program a pause dur-
ing a subsequent normal scan operation by gating the
signal on TCK. This is done by use of the GCLK bit in
the CSC register. The gated clock function is described
under the heading TCK Gating.
Overwriting TVO and Overreading TVI
If the user writes to the TVO memory when it is full,
data in the FIFO will be overwritten. If the user reads
the TVI memory when it is empty, the value will be
unpredictable and useless. In both cases the memory
pointers will become incorrect; and, consequently, the
FIFOs will be corrupted. The only way to recover is to
reinitialize and restart the interrupted operation. The
FIFOs are reinitialized by setting the values of both the
zero.
Avoiding Overwriting TVO and Overreading TVI
Overwriting TVO (overreading TVI) can be avoided by
checking if TVO has been filled (or TVI emptied).
When TVO is full, the TVOU bit in the status register
will have the value 1. When TVI is empty, the TVIM bit
in the status register will have the value 1.
Overflow and Underflow Conditions
Overflow is the condition in which more data is
scanned out of the selected/attached B-S chain than
can be stored in the TVI test data memory.
Underflow is the condition in which insufficient data is
loaded in the TVO test data memory for the current
scan operation. Underflow is not projected when the
TVO memory is loaded. The condition is discovered by
the BSM2 when it arises during the subsequent scan
operation.
When overflow or underflow of a test data memory
(FIFO) occurs, the BSM2 can be programmed to
always enter the appropriate Pause-
xR TAP Controller
state or to gate the test clock (halt the signal on TCK).
The programming is done by the loading the appropri-
ate value in the GCLK bit of the CSC register prior to
/overflow results in halting the test clock. When GCLK
= 0, under-/overflow causes transfer of the TAP control-
lers in the selected/attached B-S chain to enter the
nearest Pause-xR TAP Controller state.
Jump and Reset Commands
By use of the EXEC[1:0] bits of the CUTI register, the
controlling processor can direct the BSM2 to drive the
TAP State Tracker to specific TAP Controller states.
WARNING: The Jump and Reset commands exe-
cute whether or not there is any other
ongoing process executing in the
BSM2.
Jump Command
The jump command is designed to be used when a
BSM2 is controlling more than one B-S chain and
needs to the synchronize to the current state of the
TAP Controllers in a newly selected B-S chain after
having carried a sequence of operations on another.
This command is not locked out by a concurrently exe-
cuting process.
The jump command results in the direct movement of
the TAP State Tracker from the current TAP Controller
state to any other one selected by programming. The
move between states is not restricted to following an
arc of the TAP Controller’s finite state machine. More-
over, with the exception of a jump to/from the Test-
Logic-Reset TAP Controller state, the TMS output sig-
nal is not effected; and the TAP Controllers of the for-
merly selected/attached B-S chain will only change
state as directed by subsequent programming of the
BSM2. When the jump is to/from the Test-Logic-Reset
TAP Controller state, the signal on TMS must change
from 0 to 1 or vice versa.
WARNING: Issuing the Jump Command while exe-
cuting a scan operation, can produce
undesirable results, although the
results are predictable if the cycle of
the TCK signal is long enough so that
the controlling processor can monitor
operations.
相关PDF资料 |
PDF描述 |
|---|---|
| 1243-TYPE | Uncooled Laser Transmitter |
| 1245-TYPE | Uncooled Laser Transmitter |
| 125-0212-3 | EINBAUSTECKER PUSH PULL 8POL |
| 125-0213-6 | STECKER PUSH PULL 4POL |
| 125-0214-9 | KUPPLUNG PUSH PULL 4POL |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 1215-EN | 制造商:Thomas & Betts 功能描述:INSERT BUSHING--2 |
| 1215F10 | 功能描述:BATT PK 15.0V AA SIZE CARBN ZINC RoHS:否 类别:电池产品 >> 电池组 系列:Eveready® MSDS 材料安全数据表:Nickel Cadmium Battery MSDS 标准包装:1 系列:Cadnica 电池化学:镍镉 可充电:是 电池大小:D 单元数:10 电压 - 额定:12V 容量:4Ah 结构:正面至背面，5 排 x 2 芯电池 端接类型: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） 请注意:- 配用:SY125-ND - BATT NICAD 1.2V D 4000MAH 其它名称:SY125-L025 |
| 1215F2 | 功能描述:BATT PK 3.0V AA SIZE CARBON ZINC RoHS:否 类别:电池产品 >> 电池组 系列:Eveready® MSDS 材料安全数据表:Nickel Cadmium Battery MSDS 标准包装:1 系列:Cadnica 电池化学:镍镉 可充电:是 电池大小:D 单元数:10 电压 - 额定:12V 容量:4Ah 结构:正面至背面，5 排 x 2 芯电池 端接类型: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） 请注意:- 配用:SY125-ND - BATT NICAD 1.2V D 4000MAH 其它名称:SY125-L025 |
| 1215F2X2 | 功能描述:BATT PK 6.0V AA SIZE CARBON ZINC RoHS:否 类别:电池产品 >> 电池组 系列:Eveready® MSDS 材料安全数据表:Nickel Cadmium Battery MSDS 标准包装:1 系列:Cadnica 电池化学:镍镉 可充电:是 电池大小:D 单元数:10 电压 - 额定:12V 容量:4Ah 结构:正面至背面，5 排 x 2 芯电池 端接类型: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） 请注意:- 配用:SY125-ND - BATT NICAD 1.2V D 4000MAH 其它名称:SY125-L025 |
| 1215F2X3 | 功能描述:BATT PK 9.0V AA SIZE CARBON ZINC RoHS:否 类别:电池产品 >> 电池组 系列:Eveready® MSDS 材料安全数据表:Nickel Cadmium Battery MSDS 标准包装:1 系列:Cadnica 电池化学:镍镉 可充电:是 电池大小:D 单元数:10 电压 - 额定:12V 容量:4Ah 结构:正面至背面，5 排 x 2 芯电池 端接类型: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） 请注意:- 配用:SY125-ND - BATT NICAD 1.2V D 4000MAH 其它名称:SY125-L025 |
发布紧急采购，3分钟左右您将得到回复。