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參數(shù)資料
| 型號： | MAX11041 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Wired Remote Controllers |
| 中文描述： | 有線遙控器 |
| 文件頁數(shù)： | 8/19頁 |
| 文件大?。?/td> | 324K |
| 代理商： | MAX11041 |
M
Keypress Detection and Debounce
At power-up, the MAX11041/MAX11042 begin to moni-
tor the SENSE input for keypresses. When the
MAX11041/MAX11042 detect a keypress at SENSE,
they attempt to debounce the SENSE input. After suc-
cessful debouncing of the input, the corresponding
keypress result is inserted into the FIFO. In addition,
INT
goes low to signal a keypress to the μP.
Keypress FIFO and Time Duration
After detecting and debouncing a key, the decoded
key is stored in one byte of the 8-word FIFO. A 7-bit
internal timer starts counting the duration of the key-
press (one count = 32ms) and the result is stored after
each increment in another byte of the 8-word FIFO. The
8th bit in the time duration byte is an overflow bit that
is set when the count reaches 128. After the count
reaches 128, the 7-bit timer rolls over to 0 and contin-
ues to count while the 8th bit becomes set and stays
set until the associated FIFO entry is cleared. For key-
press durations longer than 8.16s, see the
Extended
Keypresses
section.
When the device detects another change in resistance
at SENSE (either by key release or another keypress),
the count resets and the FIFO begin recording the next
keypress/duration. This allows the 8-word FIFO to store
time duration and key-type information for up to four
keypresses and releases. When the FIFO is full and a
key is pressed, the oldest keypress information in the
FIFO is written over. Writing to the power-down bit (bit
6) in the control register or bringing
SHDN
low clears
the FIFO to its power-on-reset (POR) state.
Wired Remote Controllers
8
_______________________________________________________________________________________
1. DEBOUNCED KEYPRESS STORED IN FIFO AND INT GOES LOW, DURATION
TIMER STARTS.
2. PROCESSOR READS FIFO AND INT GOES HIGH. KEY TYPE AND CURRENT
KEYPRESS DURATION TIME SENT. FIFO IS NOT CLEARED.
3. KEYPRESS RELEASES AND INT GOES LOW. KEY TYPE AND FINAL KEYPRESS
DURATION TIME STORED IN FIFO.
4. PROCESSOR READS THE FIFO AND INT GOES HIGH. KEYPRESS INFORMATION
STORED IN FIFO FROM STEP 3 IS CLEARED.
KEY TYPE
TIME
TIME
V
INT
Figure 3. Reading the FIFO While the Key is Still Pressed
TIME
TIME
VINT
1. DEBOUNCED KEYPRESS STORED IN FIFO AND INT GOES LOW.
DURATION TIMER STARTS.
2. KEYPRESS RELEASES. KEY TYPE AND KEYPRESS TIME
DURATION INFORMATION STORED IN FIFO.
3. PROCESSOR READS FIFO COMPLETELY AND INT GOES HIGH.
PREVIOUS KEYPRESS INFORMATION CLEARED.
KEY TYPE
Figure 4. Reading the FIFO After the Key is Released
BIT NAMES
I4
0
0
CHIP ID
I7
0
0
I6
0
0
I5
0
0
I3
0
0
I2
0
0
I1
0
0
I0
0
1
MAX11041
MAX11042
Table 3. Chip ID Data Format
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX110 | Low-Cost, 2-Channel, 4-Bit Serial ADCs(±5V，2通道，±14位串行模數(shù)轉(zhuǎn)換器) |
| MAX1126 | Quad, 12-Bit, 40Msps, 1.8V ADC with Serial LVDS Outputs |
| MAX1126EGK | Quad, 12-Bit, 40Msps, 1.8V ADC with Serial LVDS Outputs |
| MAX11504 | Four-Channel, Standard-Definition Video Filter |
| MAX11505 | Four-Channel, Standard-Definition Video Filter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX11041_08 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Wired Remote Controllers |
| MAX11041_10 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Wired Remote Controller |
| MAX11041ETC | 功能描述:接口 - 專用 RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:BGA-59 |
| MAX11041ETC+ | 功能描述:接口 - 專用 Wired Remote Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:BGA-59 |
| MAX11041ETC+T | 功能描述:接口 - 專用 Wired Remote Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:BGA-59 |
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