AK4184A Datasheet, PDF (16/36 Pages) Asahi Kasei Microsystems – TSC with Keypad Scanner and GPIO Expander

[AK4184A]
■ γεςϜϦηοτ
ݯి౤ೖ࣌ʹ͸ɺRESETN pin ΛҰ౓ “L”Λೖྗ͠ϦηοτΛߦͬͯԼ͍͞ɻγεςϜϦηοτ͕ߦΘΕΔͱɺ
AK4184A ͷ಺෦Ϩδελ͸શͯॳظ஋(0000H)ɺλονεΫϦʔϯίϯτϩʔϥ͸ X ࣠ɺΦʔτυϥΠό
OFF(A1 bit = A0 bit = PD bit= “0”)ʹઃఆ͞Εɺ಺෦ঢ়ଶ͕֬ఆ͠·͢ɻ
AVDDɺIOVDD ͕ผి͞څڙͰݯΕΔ৔߹ʹ͸ɺి্ཱ͛ͪݯͷγʔέϯεΛߟ͑Δඞཁ͸͋Γ·ͤΜɻ
■ λονεΫϦʔϯίϯτϩʔϥ੍ޚ
λονεΫϦʔϯʹిѹΛҹՃ͢Δ࣠ͷબ୒ɺADCͷೖྗνϟϯωϧͷ੾ସ͑ɺADCͷύϫʔμ΢ϯϞʔυ
ͷબ୒͸ɺTable 5 ʹࣔ͢௨Γ̐Ϗοτͷ੍ޚίϚϯυͰߦ͍·͢ɻ࢒ΓͷԼҐ 12bit͸ “0”Λೖྗͯͩ͘͠͞
͍ɻ੍ޚίϚϯυͷ֤ϏοτͷఆٛͱυϥΠόεΠονͷঢ়ଶ͸ɺTable 6, Table 7 Λࢀরͯ͠Լ͍͞ɻ
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
S
A1 A0 PD
0
0
0000000000
Table 5. Touch Screen Command Word Format
Bits
15
14:13
12
11:0
Name
S
A1-A0
PD
ػೳ
λονύωϧελʔτϏοτɻίϚϯυͷઌ಄ϏοτͰඞͣ “1”
ADCೖྗνϟϯωϧબ୒ϏοτɺυϥΠόεΠονબ୒(Table 7)
ύϫʔμ΢ϯϞʔυબ୒Ϗοτ(Table 8)
Reserved
Table 6. λονεΫϦʔϯ੍ޚσʔλͷఆٛ
Input Status of Driver Switch
ADC input
(ΔAIN)
Reference
Voltage (ΔVREF)
S A1 A0 XP XN YP YN AIN+ AIN- VREF+ VREF-
Note
1 0 0 ON ON OFF OFF YP
XN
XP
XN X-axis
1 0 1 OFF OFF ON ON XP
YN
YP
YN Y-axis
1 1 0 OFF ON ON OFF XP(Z1) XN
YP
XN Z1 (Pen Pressure)
1 1 1 OFF ON ON OFF YN(Z2) XN
YP
XN Z2 (Pen Pressure)
Table 7. υϥΠόεΠον εςʔλε
MS0947-J-00
-16-
2008/04