AK4184A Datasheet, PDF (30/36 Pages) Asahi Kasei Microsystems – TSC with Keypad Scanner and GPIO Expander

[AK4184A]
γεςϜઃܭ
Figure 18 ͸γεςϜ઀ଓྫͰ͢ɻ۩ମతͳճ࿏ͱଌఆྫʹ͍ͭͯ͸ධՁϘʔυ(AKD4184A)Λࢀর͍ͩ͘͞ɻ
LED Driver
GPIO
Keypad
6x5
Digital I/O Supply
1.6∼AVDD
0.1µ
+10µ
NC
C3
C5 BRCONT GP1 GP3 NC
C1
C4
C6
GP0 GP2 GP5 GP4
R4
C2
R3 R5 _{Top View}
GP7 GP6
XP
AVDD
VSS2 R2 VSS2
XN
YP
IOVDD R1 BUSY DIN CSN PEN YN
NC KEYIRQN DOUT SCLK RESETN ^IRQN
VSS1 NC
0.1µ
0.01µ*
0.01µ*
0.01µ*
0.01µ*
Analog Supply
+10µ _{2.5∼3.6V}
4-wire
Touch Screen
µP
஫:
- AK4184A ͷ VSS1, VSS2 ͱपลίϯτϩʔϥ౳ͷάϥϯυ͸෼͚ͯ഑ઢͯ͠Լ͍͞ɻ
- σΟδλϧೖྗϐϯ(CSN, SCLK, DIN pins)͸Φʔϓϯʹ͠ͳ͍ͰԼ͍͞ɻ
- ϗετϓϩηοαͱ௨৴தҎ֎͸ɺAK4184A ͷ DOUT pin ͸ Hi-Z ঢ়ଶͰ͢ɻͦͷͨΊɺAK4184A
ͷ DOUT pin ʹ 100kΩఔ౓ͷϓϧΞοϓ͋Δ͍͸ϓϧμ΢ϯ఍߅ΛೖΕΔඞཁ͕͋Γ·͢ɻ
Figure 18. γεςϜ઀ଓਤ
■ PCB ઃܭͷ஫ҙ఺
ͱݯిάϥϯυͷऔΓํʹ͸े෼஫ҙ͍ͯͩ͘͠͞ɻVSS1 ͱ VSS2 ͸ಉ͡Ξφϩάάϥϯυʹ઀ଓͯͩ͘͠
͍͞ɻγεςϜͷάϥϯυ͸ɺΞφϩάͱσΟδλϧͰ෼͚ͯ഑ઢ͠ PC Ϙʔυ্ͷి͜ͱ͍ۙʹݯΖͰ઀ଓ
͍ͯͩ͘͠͞ɻখ༰ྔͷσΧοϓϦϯάίϯσϯα͸ͳΔ΂͘ిݯϐϯͷۙ͘Ͱ઀ଓ͍ͯͩ͘͠͞ɻ
λονύωϧ৴߸ϥΠϯʹRF౳ͷൃৼ͢઀͕ۙݯΔ৔߹͸ɺϊΠζ͕ಈ࡞ʹӨ͢·͠ڹɻRF৴߸ݯΛԕ͚͟
Δ͔ɺXP, XN, YP, YNͷ৴߸ϐϯۙ͘ʹίϯσϯα(*:Figure 18 ͷ 0.01μF)Λ࣮૷ͯ͠ϊΠζΛআͩͯ͘͞͠ڈ
͍ɻ·ͨɺλονύωϧɺGPIOɺΩʔύου৴߸ϥΠϯ͔Βͷ੩ిؾϊΠζʹΑΔޡಈ࡞΍ഁյΛ๷ࢭ͢Δ
ҝɺ֤৴߸ϐϯ(XP, XN, YP, YN, GP1-8, C1-6, R1-5 pins)ۙ͘ʹ੩ిؾอޢૉࢠΛ࣮૷ͯ͠Լ͍͞ɻ
MS0947-J-00
-30-
2008/04