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AK4182A Datasheet, PDF (14/18 Pages) Asahi Kasei Microsystems – Touch Screen Controller | |||
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ASAHI KASEI
â Ïϯ×Îà Î
[AK4182A]
Ïϯ×Îà Î͸ɺÏϯÍλονεΫϦÊϯʹàªà§®Í ͨÍͱÎà®ÎͤÎػೳͰɺA/D ίϯÏÊλÍÏÏ«Êμ΢ϯà§à¬¶à£Í´
à²à¡Í Î͢ɻ×Îà ÎÎ ÏÊÏϧͷà§à¬¶Í°Í¸ÉºYN pin ͸ GND Í´àªà¬Í Î͢ɻÎͨɺXP pin ͸ɺ಺෦à°ß
ʢRiɿtyp.50K
ÐʣͰÏϧÎοÏà§à¬¶Í´Í³ÎÎ͢ɻÎͨɺPENIRQN ͸ɺ಺෦Ͱ XP àºà¢ ͱàªà¬ÍÎÎ͢ɻÏϯ౳ʹÎÎλονεΫϦÊ
ϯÍÔ¡ÍÎÎͱɺλονεΫϦÊϯͷ 2 àºÍ·Î³ÊÏÍàªà¬Í¢ÎͨÎɺ(VCC)--- (Ri)--- (X+)---(Y-)ܦà¼Í°à°¿à½¶ÍྲྀÎÎ͢ɻ
λονεΫϦÊϯͷà°ß
͸ɺҰൠʹ਺ඦÐͳͷͰɺPENIRQN ͸ âLâ ʹͳÎÎ͢ɻÏϯÎà½Í¢Í±à°¿à½¶ÍྲྀÎͳÍͨÎɺ
PENIRQN ͸ âHâ ʹͳÎÎ͢ɻ
CSN = âHâ Í·à§à¬¶Í°Í¸ÉºPD1 bit ͱ PD0 bit Í(1,1)ÒÖÍ·à§ß¹ÉºÏϯ౳ʹÎÎλονεΫϦÊϯÍÔ¡ÍÎÎͱɺPENIRQN
͸ âLâʹͳÎÎ͢ɻÎͨɺPD1 bit ͱ PD0 bit Í´ÚÍâ1â Í·à§ß¹ÉºCSN = âHâ Ͱ͸ÏϯÍÔ¡ÍÎͨÍͲÍÍÍ´ÍÍÎÎÍ£
PENIRQN ͸à§Í´ âHâ ʹͳÎÎ͢ʢ×Îà ÎÏÎεΤÊÏϧʣ
ÎͨɺCSN = âLâ Í·à§à¬¶Í°Í¸ÉºPENIRQNÍ·à²à¡Í¸ÏÏ«Êμ΢ϯÏÊÏ
தͷPD0 bitͱØÜÍÍÎÎ͢ɻPD0 ͸ 8DCLKâÍ°
੾ÎସÍÍàµà©Ê¢à§à¡Í¸ÉºÊ°Â ÏÏ«Êμ΢ϯà©Þʱͷ߲à¢à¦°Ê£Í ɺà§à¬¶Íà¸¡Ô½Í Î͢ɻà¥Í¬Í¯ÉºÍ¦Í·à¯àª²ÎͰ͸ɺલճ
àªà°ÍÎͨPD0 à®Í±Í³ÎÎ͢ɻʢPD1 bit͸಺à¬Ø¬à¥ªà°¿Ñ¹Í·ON/OFFͰ͢ɻCSN = âHâ Í°Î಺à¬Ø¬à¥ªà°¿Ñ¹Ý¯Í¸ONà§à¬¶Í°
͢ɻʣ
i. CSN = âLâ Í° 5DCLKâÎÍ°Í·Û Ø
ÍÍ·Û ØÍ°Í· PENIRQN Í·à²à¡Í¸Éºàª²Õ³àª¬àÍÎͨà³à¾Î½ÏÏϧÍÎͼ PD0 bit Í´ÎÎܾÎÎÎ͢ɻલճàªà°à£ PD0 Í
â0â Í·à§ß¹Éºàª²Õ³Í·à³à¾Î½ÏÏϧàªà°Í´ØÜͳÍɺÏÏ¯Î»Î¿Î½Í Í¯ÍÎà§ß¹Í¸ âLâÉºÍ Í¯ÍͳÍà§ß¹Í¸ âHâ ʹͳÎÎ͢ɻ
લճàªà°à£ PD0 Í â1â Í·à§ß¹ÉºÎµÎ«Ï¦Êϯͷàªà§®Êà¶àªà§®Í´ØÜͳÍલճͷà³à¾Î½ÏÏϧàªà°Í´ÎÎ PENIRQN ÍܾÎ
ÎÎ͢ɻÍÍ·à§ß¹Éºàª²Õ³à³à¾Î½ÏÏÏ§Í X ࣠ÍÎÍ͸ Y ࣠ͷà§ß¹Éºà§Í´ âLâ Ͱ͢ɻÎͨɺલճà³à¾Î½ÏÏϧÍÔ¹à±Éº
VBATɺIN1 Í·à§ß¹Í¸à§Í´ âHâ Ͱ͢ɻ
ii. CSN = âLâÍ° 5DCLKâÍÎ 20DCLKâÎÍ°Í·Û Ø
ÍÍ·Û ØͰ͸ɺબàÍÎͨà³à¾Î½ÏÏϧʹÎÎ PENIRQN Í·à²à¡ÍܾÎÎÎ͢ɻà³à¾Î½ÏÏÏ§Í±Í Í¯ X ࣠ÍÎÍ͸ Y à£
ÍબàÍÎͨà§ß¹ÉºÎµÎ«Ï¦Êϯͷàªà§®Êà¶àªà§®Í´ØÜͳÍà§Í´ âLâ ʹͳÎÎ͢ɻ Îͨɺà³à¾Î½ÏÏÏ§Í±Í Í¯ÉºÔ¹à±Éº
VBATɺIN1 ÍબàÍÎͨà§ß¹ÉºÎµÎ«Ï¦Êϯͷàªà§®Êà¶àªà§®Í´ØÜͳÍà§Í´ âHâ ʹͳÎÎ͢ɻ
iii. CSN = âLâÍ° 20DCLKâÒß±Í·Û Ø
ÍÍ·Û ØÍ°Í· PENIRQN Í·à²à¡Í¸Éºà ճબàÍÎͨà³à¾Î½ÏÏϧÍÎͼ PD0 bit Í´ÎÎܾÎÎÎ͢ɻà ճͷ PD0 àªà°Í
â0â Í·à§ß¹Éºà ճͷà³à¾Î½ÏÏϧàªà°Í´ØÜͳÍɺÏÏ¯Î»Î¿Î½Í Í¯ÍÎà§ß¹Í¸ âLâÉºÍ Í¯ÍͳÍà§ß¹Í¸ âHâ ʹͳÎÎ͢ɻ
à ճͷ PD0 àªà°Í â1â Í·à§ß¹ÉºÎµÎ«Ï¦Êϯͷàªà§®Êà¶àªà§®Í´ØÜͳÍà Õ³àªà°ÍÎͨà³à¾Î½ÏÏϧʹÎÎ PENIRQN Í
ܾÎÎÎÍ¢ÍÍ·à§ß¹ÉºÍÍ·à³à¾Î½ÏÏÏ§Í X ࣠ÍÎÍ͸ Y ࣠ͷà§ß¹Éºà§Í´ âLâ Ͱ͢ɻÎͨɺÍÍ·à³à¾Î½ÏÏϧÍÔ¹à±Éº
VBATɺIN1 Í·à§ß¹Í¸à§Í´ âHâ Ͱ͢ɻ
ίÏϯÏ
àµß¦à®¤ÉºÍÎͼ A/D ÏÊλà¥à¾à®¤Í·à·à½Í³×Îà ÎÍ´ØÍ Í¯Í¸ÉºCSN Í âLâ Í·ØɺÏεÏÏϩηοαà¬Í PEN
×Îà ÎÎÍ¢à¢ÛÎÍͱͰରॲÕೳͰ͢ɻ
EN1
MS0482-J-01
IOVDD
Ri =
50kΩ
VCC
EN2
Driver OFF
PENIRQN
VCC
XP
YN
Driver ON
Figure 8 Ïϯ×Îà ÎÕ³à¿
2007/12
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