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參數(shù)資料
| 型號： | TRC1315DR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 搖控器 |
| 英文描述： | RF, REMOTE CONTROL SUPPORT CIRCUIT, PDSO14 |
| 封裝： | PLASTIC, SO-14 |
| 文件頁數(shù)： | 14/27頁 |
| 文件大小： | 358K |
| 代理商： | TRC1315DR |
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TRC1300, TRC1315
MARCSTAR
I E/D
REMOTE CONTROL ENCODER/DECODERS
SLWS011D – AUGUST 1996 – REVISED JANUARY 1997
21
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
test mode
TRC1300 and TRC1315 MARCSTAR I E/D devices are equipped with a self-test function that checks the RAM,
ROM, and EEPROM memory areas:
D The RAM is tested by writing checkerboard bit patterns into the RAM and then reading them back. The test
is passed if the correct data is read from the RAM.
D The ROM is tested by calculating a new checksum for each location containing data and then comparing
it to a predetermined value. The test is passed if the two values match.
D The EEPROM is tested by calculating a new checksum for each of the four 40-bit locations and comparing
them with checksum values stored in EEPROM. The test is passed if the two values match.
When TEST is momentarily held at VCC, the device enters the self-test mode. While in this mode, the device
runs through the tests and then indicates results with a flashing LED. The result codes are shown in Table 2.
Table 2. LED Flashing Self-Test Error Codes
LED FLASHES
CONDITION
0
No tests passed
1
Passed EEPROM test only
2
Passed ROM test only
3
Passed ROM and EEPROM tests
4
Passed RAM test only
5
Passed RAM and EEPROM tests
6
Passed RAM and ROM tests
7
Passed all tests
The switch that initiates the test mode should be momentary — the device continues to run through the tests
as long as TEST is held at VCC.
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