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參數資料
| 型號： | MR82510 |
| 廠商： | Intel Corp. |
| 英文描述： | ASYNCHRONOUS SERIAL CONTROLLER |
| 中文描述： | 異步串行控制器 |
| 文件頁數： | 12/40頁 |
| 文件大小： | 463K |
| 代理商： | MR82510 |
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M82510
REMOTE LOOPBACK
271072–12
Figure 13. Remote Loopback
The TXD pin and RXD pin are shorted internally (the
data is not sent on to the RX Machine). This feature
allows the user to check the communications chan-
nel as well as the Tx and Rx pin circuits not checked
in the Local Loopback mode.
AUTO ECHO
271072–13
Figure 14. Auto Echo
In Echo Mode the received characters are automati-
cally transmitted back. When the characters are
read from the Rx FIFO they are automatically
pushed back onto the Tx FIFO (the flags are also
included). The Rx Machine baud rate must be equal
to, or less than, the Tx Machine baud rate or some
of the characters may be lost. The user has an op-
tion of preventing echo of special characters; Con-
trol Characters and characters with Errors.
Power Down Mode
The M82510 has a ‘‘power down’’ mode to reduce
power consumption when the device is not in use.
The M82510 powers down when the power down
command is issued via the Internal Command Regis-
ter (ICM). There are two modes of power down,
Sleep and Idle.
In Sleep mode, even the system clock of the
M82510 is shut down. The system clock source of
the M82510 can either be the Crystal Oscillator or
an external clock source. If the Crystal Oscillator is
being used and the power down command is issued,
then the M82510 will automatically enter the Sleep
mode. If an external clock is being used, then the
user must disable the external clock in addition to
issuing the Power Down command, to enter the
Sleep mode. The benefit of this mode is the in-
creased savings in power consumption (typical pow-
er consumption in the Sleep mode is in the ranges of
100s of microAmps). However, upon wake up, the
user must reprogram the device. To exit this mode
the user can either issue a Hardware reset, or read
the FIFO Level Register (FLR) and then issue a soft-
ware reset. In either case the contents of the
M82510 registers are not preserved and the device
must be reprogrammed prior to operation. If the
Crystal Oscillator is being used then the user must
allow enough time for the oscillator to wake up be-
fore issuing the software reset.
The M82510 is in the idle mode when the Power
Down command is issued and the system clock is
still running (i. e. the system clock is generated ex-
ternally and not disabled by the user). In this mode
the contents of all registers and memory cells are
preserved, however, the power consumption in this
mode is greater than in the Sleep mode. Reading
FLR will take the M82510 out of this mode.
NOTE:
The data read from FLR when exiting Power Down
is invalid and should be ignored.
12
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| MR8251A | PROGRAMMABLE COMMUNICATION INTERFACE |
| MR851G | Axial Lead Fast Recovery Rectifiers |
| MR851RL | Axial Lead Fast Recovery Rectifiers |
| MR851RLG | Axial Lead Fast Recovery Rectifiers |
| MR852G | Axial Lead Fast Recovery Rectifiers |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MR82510/B | 制造商:Rochester Electronics LLC 功能描述: |
| MR8251A | 制造商:Intel 功能描述: |
| MR8251A/B | 制造商:Rochester Electronics LLC 功能描述: |
| MR8254/B | 制造商:Rochester Electronics LLC 功能描述: |
| MR8254/R | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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