CH341Ĵڷʽ֧WINDOWS 98/ME/2000/XP/Vista/Linuxṩ
CH341USBתִ֧õĴڼؼԹ߳

װ
1. ׼INFļװ
    WINDOWSʾҵӲָĿ¼DRIVERԶװ
    WINDOWSûʾҵӲô豸ӲбУ
    ѡʺŵUSB豸ָĿ¼
2. ʹװ
    ֱʹCH341SER.EXEװ԰װ//ж
    ÷û

CH341ʹ÷
    CH341ʵUSBתڣ߼ܷʹ÷ͨͬ
    ͨڵ
      CH341ṩǷ洮ڣԲִ֧ڱĴӲI/O
      ͨǾ̬豸CH341Ƕ̬豸ʱϿ
      CH341ĸӹܣнܣȡⲿEEPROMָ֧߲ʡ
    ṩģԡߣ󽫡͡ѡΪֹ뷢͡
      򿪴ںͿCH341ڻͨڵؼշԡ

ע
    CH341Ǽ弴õUSB豸ʹCH341ڽݴĹУ
    ԽϿϿָUSBȡCH341߹رCH341ĵԴ
    Ҳ˵ӦóرոôںCH341ڲſԴUSBаγ

    ӦóʹCH341ڵĹУCH341豸USBжϿ
    ôӦóӦþرCH341ڲ˳رռ˳Ҫʱ䣩

    CH341ͨѶз󣬼пCH341ѾϿ
    ڼ⵽رCH341ڣԵ´򿪴ͨѶ

    豸¼֪ͨķԼʱ˽CH341豸Ͽ
    ӶʹӦóܹʱ򿪺͹رCH341ڡ
    ڶ̬ӿCH341PT.DLLṩAPIԼCH341ڲ¼
    ʶCH341ڵȣοCH341PT.Hļ

    ͨѶʽϸߣýϴĻWINDOWS 98/ME£
    ̵߳USBʵʱԶWINDOWS 2000/XPڽջС
    ôͨѶʽϸʱմݻᵼ´ڻݡ

    ڵײUSBǽֽݰ󰲲嵽1mS֡нд䣬
    пܽշĽŵֽʵʷָUSBݰ
    USB֡Уֽʱп1mS2mS

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Ҫʿƣƣ鲻ҪʹMODEMźſƣΪЧʽϵͣ
CH341TEN#RDY#ʵִӲʿƣTEN#Ϊ룬RDY#Ϊ
TEN#Ϊ͵ƽʱCH341ӴڷݣߵƽʱCH341ͣݣ
RDY#Ϊ͵ƽʱ˵CH341Խմݣߵƽ˵CH341æܽա

Ƭæ߲115200bpsʱͨҪʿƣ
ٸ߻߼ƬæҪǲTEN#RDY#ʿơ

CH341ڴʱӲʱֻҪߣGNDTXDRXD
ֱ뵥Ƭִ֧50bps2MbpsMCS51Ƭ
   CH341        MCS51Ƭ
      GND     <=>       GND
      TXD     <=>       RXD
      RXD     <=>       TXD
      TENGND

뵥ƬʱͨCH341TEN#ֱӽӵأCH341ݣ
Ԥ㵥ƬܻմݣôӦýTEN#ӵƬI/Oţ
ƬæʱɵƬCH341TEN#Ϊ͵ƽCH341Ӵڷݣ
ƬæʱɵƬCH341TEN#ΪߵƽCH341ͣӴڷ

CH341TNOWշ״̬ڰ˫ͨѶշлRS485շл

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ʶCH341ڣ֪CH341ĴںCOM?

״ΰװCH341ʱCH341ںWINDOWSԶ䣨ͨCOM3ʼ䣩
װɺ豸е޸ĴںšӦó޷֪CH341
ʵʴںţԱʹһЩⷽʶCH341ڣȻʹá

WINDOWS 98/MEϵͳ£CH341ں뵱ǰӲԴйأĬΪԶԴ
  Ӷڵǰʵʴں֮󣬿ڴѡCH341Դָںš
WINDOWS 2000/XPϵͳ£CH341ں뵱ǰUSB˿йأ״ΰװʱ䣬
  WINDOWSUSB˿CH341Ĵںţڴͨ߼ѡָںš

Ƚϼ򵥵ܷµķǣ״ΰװCH341ںó޸עߵԣ
ΪCH341Ĵں޸ΪCOM5ܿõCOM1COM4÷򵥵пܳͻ

ʶ𷽷ǲѯ
   Դ򿪣򿪳ɹͨôշַʶCH341ڣ
   ÷ǴӡCOM1ʼšCOM2Դ򿪴ڡĳڴ򿪳ɹ
   ô300bpsôڷַCH341Ser?Լ200֮
   յӦַWôôھǵǰѾӵCH341ڡƷǣ
   COM1ʼδÿڣ򿪴ʧڲڻʹã
   򿪳ɹøôڲΪ300ȻôдASCIIַ"$CH341Ser?"
   עСд10ַһд룬ôͨڣôͨûκηأ
   ôCH341ڣôӦóܽյһASCIIַ"W"ԴʶCH341
   磬ôڼ/Թʾ
     ڵĲѡΪ300bpsЩѡʺ´򿪴ڣ
     ַΪ10ASCIIݣ $CH341Ser?
     ͳɹͨûзأCH341ڽ1ASCII룺 W

ʹCH341PT.DLL̬⣬ӦóֱӵDLLӦAPIʶCH341ڣ
   ʶٶȿ죬Чʸߡע⣬CH341PT.DLLINFжΪѡװĬǰװ

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ڶȡⲿEEPROM

CH341I2Cӿڵ糣õ24ϵдзʧ洢EEPROM
֧24C01A24C0224C0424C0824C16ȣԼ֮ʱݵ
24ϵEEPROMȿCH341Ҳڶϵڼ䱣Ҫݡ
籣ƷкŵʶϢӦóԶʶƷܵȡ
Ҫ֧24C6424C25624C512ԼEEPROMοCH341ϡ

Ӧó԰ڷʽдCH341ӵ24ϵEEPROMǣ
  CH341ڲΪ300Ȼ4ֽΪһдڣ
  ֽڱ@ַӦʮΪ40H
  ĵڶֽ24ϵEEPROM豸ַλ0Ƿ־0Ϊд1Ϊ
  ĵֽ24ϵEEPROMĵԪַ
  ĵֽ׼д24ϵEEPROMһݣǶָΪ00H
  дôͳɹ˵дɹEEPROMҪʱ10mSһ
  Ƕôͳɹ󣬿ԴӴڽյһֽڵݣǶ

磬CH34124C0XA2=A1=A0=GND洮ڵĲѡΪ300bps
ôڼ/Թʾ
1Ϊ4ʮݣ 40 A1 01 00
   24C0XеַΪ01HݶԴӴڽյһֽڵ
2Ϊ4ʮݣ 40 A0 2A 69
   һֽڵ69Hд24C0XеַΪ2AHĵԪͨȴ10mSܽһ
3Ϊ4ʮݣ 40 A5 E7 00
   24C0XеַΪ02E7HݶԴӴڽյһֽڵ
   ע⣬ֻ24C0824C16еַΪ02E7HݵԪ

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ַ֧Ǳ׼ʻ߸ͨѶ

һЩǱ׼ʻ߳淽޷õĸٲʣCH341ṩⷽ
Ӧó԰дݵķʽCH341ĴͨѶʣǣ
  CH341ڲΪ300ȻASCIIַдڣ
  ֽڱ#ַӦʮΪ23H
  мΪ7ֱʾĲʣַ9600921600ȣ
  βֽڱ_»ߣӦʮΪ5FH
  Ҳ˵ҪõĲַʽ#ַ_ַ֮䣬Ϊһ
  300bps·͵CH341ĴڣôCH341Ϊ޸CH341Ĳʣ
  ᱻΪݴӴòɹغ
  CH341ʵʹָ²ʣȻϵͳڿؼȻΪǹ300bps
  Ҫٴַı䲨ʣôҪó淽CH341ĲΪ300bps

磬ôڼ/Թʾ
1CH341ڵĲѡΪ300bpsЩѡʺ´򿪴ڣ
   ַΪ6ASCIIݣ #9600_
   ͳɹCH341ʵʹ9600bps
2CH341ڵĲѡΪ300bpsЩѡʺ´򿪴ڣ
   ַΪ8ASCIIݣ #460800_
   ͳɹCH341ʵʹ460800bps
3CH341ڵĲѡΪ300bpsЩѡʺ´򿪴ڣ
   ַΪ9ASCIIݣ #1000000_
   ͳɹCH341ʵʹ1000000bps

CH341֧50bps2MbpsĲʣӦóCH341ı䴮ͨѶʱ
CH341򽫲ʻΪʳȻ޸CH341оƬڲĲʳĴ
CH341ڵͨѶʵCH341оƬڲĲʳĴ
CH341ڲĴڻ׼λʱΪ48/8=6MHz12MHzҲʳֻ֧
ָʱӦÿʵʻڲʴ19200bpsʱļ㷽ǣ
    X = 6000000 Բʺֵ
    Y = X ֵ
     = ( Y - X ) / X

ΪCH341ֵ֧ĳòʣδעĻ׼λʱΪ6MHzδעС0.16%
    921600 (12MHz),   460800,   307200 (12MHz),
    230400,  153600,  128000 (0.27%),    115200,
    76800,   57600,   56000,    38400,   33600,
    28800,   19200,   14400,    9600,    7200,
    4800,    3600,    2400,     1800,    1200,
    900,     600,     300,      150,     134.5,
    110,     100,     75,       50,      2000000,
    1500000, 1200000, 1000000,  750000,  500000,
    375000,  250000,  200000,   187500,  100000,
    93750,   75000,   50000,    25000,   10000
ֻҪС2.5%CH341֧֣ʱҪ˵֮͡
Ϊ˿ɿͨѶ鲻Ҫʹ1%Ĳʡ

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USB豸洮

CH341ӲĬǷ洮
ڼ˶һڣλCH341оƬҲʹôͨѶ
Ӧóͨ洮ʵUSBݴ䣬÷ͨͬ

ϣڼ˷ΪڣôʹUSB豸
ڼ˶һUSB豸λCH341оƬȻʹôͨѶ
ӦóͨDLLṩAPIʵUSBݴ,
÷CH341ڡCH372CH375ƣԲοصӦóԴ

CH341ӲUSB豸벢ӲUSB豸CH341PARȫͬ
װϢļINFеPIDͬοCH341PARINFеע˵

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