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參數資料
| 型號： | 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位單片機的小型通用紅外遙控器 |
| 文件頁數： | 23/66頁 |
| 文件大小： | 762K |
| 代理商： | EM6517 |
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EM6517
FOR ENGINEERING ONLY
EM Microelectronic-Marin SA, 09/99, Rev. A/277
23
8
The EM6517-1 has a built-in universal cyclic counter. It can be configured as 10, 8, 6 or 4-bit counter. If 10-bits
are selected we call that full bit counting, if 8, 6 or 4-bits are selected we call that limited bit counting.
The counter works in up- or down count mode. Eight clocks can be used as the input clock source, six of them
are derived prescaler frequencies and two are coming from the input pads PA[0] and PA[3]. In this case the
counter can be used as an event counter.
The counter generates an interrupt request
IRQCount0
every time it reaches 0 in down count mode or 3FF in
up count mode. Another interrupt request
IRQCntComp
is generated in compare mode whenever the counter
value matches the compare data register value. Each of this interrupt requests can be masked (default). See
section 13 for more information about the interrupt handling.
10-bit Counter
A 10-bit data register
CReg[9:0]
is used to initialize the counter at a specific value (load into
Count[9:0]
). This
data register (
CReg[9:0]
) is also used to compare its value against
Count[9:0]
for equivalence.
A Pulse-Width-Modulation signal (PWM) can be generated and output on port B terminal PB[3].
8.1 Full and Limited Bit Counting
In Full Bit Counting mode the counter uses its maximum
of 10-bits length (default ). With the
BitSel[1,0]
bits in
register
RegCDataH
one can lower the counter length,
for IRQ generation, to 8, 6 or 4 bits. This means that
actually the counter always uses all the 10-bits, but
IRQCount0 generation is only performed on the number
of selected bits. The unused counter bits may or may not
be taken into account for the
IRQComp
generation depending on bit
SelIntFull
.
Refer to chapter 8.4.
Figure 17. 10-bit Counter Block Diagram
En
Comparator
ck
Up/Down
Up/Down Counter
En
EvCount
Counter Read Register
RegCDataL, M, H
(Count[9:0])
RegCDataL, M, H (CReg[9:0])
Data Register
Load
IRQCntComp
PWM
IRQCount0
DB[3:0]
PA[0]
Ck[15]
Ck[12]
Ck[10]
Ck[8]
Ck[4]
Ck[1]
PA[3]
ck
MUX
RegCCntl1, 2
CountFSel2...0
Up/Down
Start
EvCount
Load
EnComp
Table 7.7.1. Counter length selection
BitSel[1]
0
0
1
1
BitSel[0 ]
0
1
0
1
counter length
10-Bit
8-Bit
6-Bit
4-Bit
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相關代理商/技術參數 |
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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 |
| EM6520 | 制造商:EMMICRO 制造商全稱:EM Microelectronic - MARIN SA 功能描述:MFP version of EM6620 Ultra Low Power Microcontroller 4x8 LCD Driver |
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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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