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參數(shù)資料
| 型號(hào)： | EM6517 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 4位微控制器 |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| 中文描述： | 4位單片機(jī)的小型通用紅外遙控器 |
| 文件頁(yè)數(shù)： | 30/66頁(yè) |
| 文件大?。?/td> | 762K |
| 代理商： | EM6517 |
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EM6517
FOR ENGINEERING ONLY
EM Microelectronic-Marin SA, 09/99, Rev. A/277
30
During automatic transmission the general INTEN bit is disabled automatically to prevent other Interrupts to
reset the standby mode. At the end of automatic transmission EM6517 leaves standby mode (
INTEN
is
automatically Enabled) and sets TestVar[3] high. TestVar[3] = 1 is signaling SWB transmission is terminated.
As soon as SWBAuto is high, the general IntEn flag is disabled until the SWBAuto goes back low.
After automatic SWB transmission
INTEN
bit becomes high. Although set to 1 via the Halt instruction the bit
INTEN
is disabled throughout the whole SWB automatic transmission. It resumes to 1 at the end of transmission
The data to be sent must be prepared in the following order:
First nibble to be sent must be written in the
RegSWBuff
register . The other nibbles must be loaded in the RAM
from address 00 (second nibble at adr.00, third at adr.01,...) up to the address with last nibble of data to be send
= "
size
" address. Max. address space for SWB is 3E ("
size
" 3E hex) what gives together with
RegSWBuff
up
to 64 nibbles (256 bits) of data to be sent. The minimum amount of data bits one can send in automatic SWB
mode is 8 . In this case the last RAM address to be sent is 00 ("size" = 00).
Once data are written into the RAM and into the RegSWBuff, the user has to load the "
size
" (adr. of the last
nibble to be send - bits size[5 :0]) into the
RegSWBSizeL
and
RegSWBSizeH
register, later register together
with SWBAuto =1 bit.
Now everything is ready for automatic serial transmission. To start the transmission one has to put the EM6517
in standby mode with the HALT instruction. When transmission is finished TESTvar[3] (can be used for
conditional jumps) becomes active High, the bit
SWBAuto
is cleared , the processor is leaving the Standby
mode and
IntEn
is switched on.
The processor now starts to execute the first instruction placed after the HALT instruction (for instance write of
RegSWBuff register to clear TESTvar[3]), except if there was a IRQ during the serial transmission. In this case
the CPU will go directly in the interrupt routine.
TestVar[3] stays high until
RegSWBuff
is rewritten. Before starting a second SWB action this bit must be
cleared by performing a dummy write on
RegSWBuff
address.
Figure 23. Automatic Serial Write Buffer Transmission
Because the data in the RAM are still present one can start transmitting the same data once again only by
recharging the RegSWBuff , RegSWBSizeL and RegSWBSizeH register together with SWBAuto bit and putting
the EM6517 in HALT mode. This will start a new transmission.
Using the SWB high impedance mask option in automatic mode. As soon as one goes into Halt mode the SWB
outputs go to ‘0’ and SWB transfer starts. At the end of the transfer the SWB outputs go immediately back into
high impedance state.
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| EM6517-240# | 制造商:DANAHER - FLUKE 功能描述:BNC TO BANTAM CABLE 制造商:Fluke Electronics 功能描述:BNC TO BANTAM CABLE |
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| EM65240 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Graphic STN LCD Drivers |
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