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參數(shù)資料
| 型號(hào)： | AK4184 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | TSC with Keypad Scanner and GPIO Expander |
| 中文描述： | 臺(tái)糖與鍵盤掃描儀和GPIO擴(kuò)展 |
| 文件頁數(shù)： | 30/36頁 |
| 文件大小： | 597K |
| 代理商： | AK4184 |
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[AK4184]
MS0603-E-00
2007/04
30
SYSTEM DESIGN
Figure 17 shows a system connection diagram for the AK4184. The evaluation board [AKD4184] is available, which
demonstrates the optimum layout and power supply arrangement.
Top View
NC
C1
R4
C2
R3
R5
VSS2
R2
IOVDD
R1
NC KEYIRQN
BUSY
DIN
CSN
PEN
IRQN
DOUT
SCLK
RESETN
VSS1
NC
YN
XN
YP
XP
AVDD
GP7
GP6
GP5
GP4
GP3
NC
GP2
GP1
GP0
BRCONT
C6
C5
C4
C3
VSS2
Digital I/O Supply
1.6
～
AVDD
+ 10μ
0.1μ
GPIO
μP
+ 10μ
Analog Supply
2.5
～
3.6V
0.1μ
Keypad
6 x 5
4-wire
Touch Screen
0.01μ*
0.01μ*
0.01μ*
0.01μ*
LED Driver
Note:
- VSS1 and VSS2 of the AK4184 should be distributed separately from the ground of external controllers.
- Do not allow digital input pins (CSN, SCLK, DIN pins) to float.
-The DOUT pin is floating except when communicating with the host processor. A 100k
Ω
pull-down or pull-
up register should be connected.
Figure 17. Typical connection diagram
■
Attention to the PCB wiring
The AK4184 requires careful attention to power and grounding. VSS1, VSS2 should be connected to analog ground
system analog ground and digital ground should be connected together as close as possible to where the supplies are
brought onto the printed circuit board. Decoupling capacitors should be as close to the AK4184 as possible, with the
small value ceramic capacitor being the closest.
When an EMI source is close to the touch panel analog signal line, EMI noise reduces analog performance
characteristics. Noise canceling capacitors as close as possible to each pin (XP, XN, YP, YN pins) of the AK4184 to
avoid this noise. (Figure 17)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AK4184VG | TSC with Keypad Scanner and GPIO Expander |
| AK4220 | 7:3 Audio Switch and 6:3 Video Switch |
| AK4220VQ | 7:3 Audio Switch and 6:3 Video Switch |
| AK4250 | Output Coupling Capacitor-less Video Amp with LPF |
| AK4250VU | Output Coupling Capacitor-less Video Amp with LPF |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK4184A | 制造商:AKM 制造商全稱:AKM 功能描述:TSC with Keypad Scanner and GPIO Expander |
| AK4184AEG | 制造商:AKM 制造商全稱:AKM 功能描述:TSC with Keypad Scanner and GPIO Expander |
| AK4184VG | 制造商:AKM 制造商全稱:AKM 功能描述:TSC with Keypad Scanner and GPIO Expander |
| AK4185 | 制造商:AKM 制造商全稱:AKM 功能描述:Low Power Touch Screen Controller with SPI? Interface |
| AK4185_10 | 制造商:AKM 制造商全稱:AKM 功能描述:Low Power Touch Screen Controller with SPI? Interface |
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