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參數(shù)資料
| 型號(hào)： | TLV5614EVM |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | TLV5614 Evaluation Module(TLC5614評(píng)估板) |
| 中文描述： | TLV5614評(píng)估模塊（TLC5614評(píng)估板） |
| 文件頁數(shù)： | 23/32頁 |
| 文件大?。?/td> | 395K |
| 代理商： | TLV5614EVM |
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Processor Controlled Testing
3-5
EVM Operation
3.2
Processor Controlled Testing
This section describes the operation of the EVM through a host processor
such as a DSP or microcontroller. Daughterboard connectors J10 and J11 are
designed for direct plug in to a DSP development board. Connectors J6
through J9 however, can be used to develop a custom interface to suit most
any situation. Each of the following subsections gives the EVM user the
necessary information required to successfully operate the data converters.
3.2.1
Address Selection
When testing the EVM with a host processor, several options are available.
Closing jumpers W10, W12, and W14 allow the user to access the data
converters via address decoder U13. Address selecting U3 or U4 allows the
serial input data and frame sync signals to be applied to the selected device.
EVM Address Bus:
A1– J9.9
A0 – J9.7
Reference
Selection
Results
Device
0
0
N/A
None
None
0
1
U3
SDI + FS
TLV5630 / TLV5631
1
0
U4
SDI + FS
TLV5610 / TLV5608
1
1
U5
CS
TLV5604 / TLV5614
The output enable pin for the address decoder can be controlled through the
DSP interface via W17. When W17 is in position 1-2 the IS signal of the DSP
is used to enable the decoder. Position 2-3 uses the DSP address line
DC_A15. The output enable pin can also be tied low by inserting a shorting
jumper across J9 pins 1-2.
3.2.2
Frame Sync
When using this EVM with a host processor, jumper W5 must be moved to
position 2-3. This allows an external frame sync signal to be applied to the data
converters via J11-23 or J6-11. This external frame sync signal is directed to
the eight-channel data converters based on the state of the address bus.
The TLV5604/14 device located at position U5 will receive a frame sync and
serial input data regardless of the state of the address bus. This device uses
a dedicated chip-select pin to control conversion. The frame sync and serial
data inputs are ignored while chip select is high.
3.2.3
Serial Input Data
When using this EVM with a host processor, jumper W11 must be moved to
position 2-3. This allows serial input data from the host processor to be applied
to the selected data converter via J11-24 or J6-7.
U3 and U4 have the ability to work in daisy-chainfashion. When DOUT is
enabled in either device, jumpers W6 and W9 can select the source of the
serial input data. The data is buffered and then shifted via the DOUT pin (U3
or U4, pin 19) after a 16-clock cycle delay.
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