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参数资料
| 型号： | M34519E8FP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDSO42 |
| 封装： | 0.450 INCH, 0.80 MM PITCH, PLASTIC, SSOP-42 |
| 文件页数： | 13/50页 |
| 文件大小： | 1808K |
| 代理商： | M34519E8FP |
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20
9571B–AT42–08/10
AT42QT1111-MU/AT42QT1111-AU
With the guard channel not enabled, all the keys work normally.
Note:
If a key is already “in detect” when the guard channel becomes active, that key will
remain in detect and the guard key will not activate until the active key goes out of
detect.
Figure 4-9.
Guard Channel Example
4.10
Self-test Functions
4.10.1
Internal Hardware Tests
Internal hardware tests check for hardware failure in the device’s internal memory areas and
data paths. Any failure detected in the function or contents of application ROM, RAM or registers
causes the device to reset itself.
The application code is scanned with a CRC check routine to confirm that the application data is
all correct.
The RAM and registers are checked periodically (every 10 seconds) for dynamic and static
failures.
4.10.2
Functional Checks
Functional checks confirm that the device is operating within expected parameters; any failure
detected in these tests is notified to the system host. The device will continue to operate in the
event that such functional failures are detected.
The functional tests are:
Check that the channel-measurement signals are within the defined range.
Confirm that data stored in the EEPROM is valid.
These tests are carried out as the particular functions are used. For example, the EEPROM is
checked when the device attempts to load data from EEPROM, and the channel signals are
checked when a measurement is carried out.
Note:
If a particular channel is unused, the threshold of that channel should be set to 0 to
prevent the incorrect reporting of the unused channel as being in an error state.
Guard Channel
Formed of One Key
Key Pad Formed
of Six Keys
相关PDF资料 |
PDF描述 |
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| M34519M8-XXXFP | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO42 |
| M34519M6-XXXFP | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO42 |
| M34553M8H-XXXFP | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP48 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M34519M6-XXXFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:4-BIT CISC SINGLE-CHIP MICROCOMPUTER 720 FAMILY / 4500 SERIES |
| M34519M8-XXXFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:4-BIT CISC SINGLE-CHIP MICROCOMPUTER 720 FAMILY / 4500 SERIES |
| M34-52 | 制造商:GAMEWELL-FCI 制造商全称:GAMEWELL-FCI 功能描述:Three-Fold Fire Alarm Boxes and Transmitters |
| M34524EDFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34524M8-XXXFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
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