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參數資料
| 型號： | AK4650 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | Codec |
| 英文描述： | 16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC |
| 中文描述： | 16位ツヒ編解碼器麥克風/惠普/胰腎聯合移植腺苷 |
| 文件頁數： | 49/86頁 |
| 文件大小： | 824K |
| 代理商： | AK4650 |
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[AK4650]
MS0502-E-01
2007/04
- 49 -
■
Pen Interrupt
The AK4650 has pen interrupt function to detect the pen touch. Pen interrupt function is enabled at power-down state. YN
pin is connected to GND at the PEN interrupt enabled state. And XP pin is pulled up via an internal resistor (Ri), typically
50k
Ω
. INTN pulled up via an external resistor, 100k
Ω
, is also connected to XP pin. If the two plates are touched, the
current flows via <TSVDD> – <Ri> – <XP> –<the plates> – <YN>. The resistance of the plate is generally 1k
Ω
or less,
INTN pin is forced to “L”. If the pen is released, INTN pin returns “H” because two plates are disconnected, and the
current does not flow via two plates.
The operation of INTN pin depends on A2-0 and PINTE bits when PM12AD bit is “1”. If PINTE bit is “1”, INTN pin
goes to “L” when the plate is touched with pen or finger, and goes to “H” when the plate is not touched regardless of the
selection of the analog input channel. If PINTE bit is “0” or 12bit ADC is executed, the operation of INTN pin depends on
the selection of the analog input channel regardless of the touched/non-touched state. If the X-axis or Y-axis is selected as
analog input, INTN pin is forced to “L” regardless of the touched/non-touched state. If VBAT, or auxiliary inputs is
selected, INTN pin is forced to “H” regardless of the touched/non-touched state.
When PM12AD bit is “0”, XP, YP and XN pins go to Hi-Z state at PINTE bit = “0”. At that state, no current flows on
touch screen even if pen is touched. INTN pin is forced to “H” regardless of the touched/non-touched state. If PINTE bit
= “1”, INTN pin goes to “L” when the plate is touched.
PM12AD bit
PINTE bit
Pen Interrupt
0
0
Disable
Always “H”.
0
1
Enable
“L” by pen touch, otherwise “H”.
1
0
Disable
“L” at XY axis measurement, otherwise “H”.
During measurement:
“L” at XY axis measurement, otherwise “H”.
After measurement:
“L” by pen touch, otherwise “H”.
Table 42. INTN pin Operation (x: Don’t care)
INTN pin Operation
1
1
Auto
XP pin
INTN pin
Driver ON
YN pin
100k
Ω
EN2
50k
Ω
Driver OFF
EN1
AK4650
Figure 37. Pen Interrupt Block Diagram
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相關代理商/技術參數 |
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| AK4650VG | 制造商:AKM 制造商全稱:AKM 功能描述:16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC |
| AK4651 | 制造商:AKM 制造商全稱:AKM 功能描述:16Bit ツヒ CODEC with MIC/HP/SPK-AMP |
| AK4651VG | 制造商:AKM 制造商全稱:AKM 功能描述:16Bit ツヒ CODEC with MIC/HP/SPK-AMP |
| AK4664VQ | 功能描述:IC CODEC STEREO 20BIT LQFP 制造商:akm semiconductor inc. 系列:* 零件狀態(tài):上次購買時間 標準包裝:1,000 |
| AK4665A | 制造商:AKM 制造商全稱:AKM 功能描述:20-Bit Stereo CODEC with MIC/HP-AMP |
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