參數(shù)資料
型號(hào)： HT82M9AEE
廠商： Holtek Semiconductor Inc.
英文描述： USB Mouse Encoder 8-Bit MCU with EEPROM
中文描述： USB鼠標(biāo)編碼器8位微控制器帶有EEPROM
文件頁(yè)數(shù)： 18/48頁(yè)
文件大?。?/td> 330K
代理商： HT82M9AEE
HT82M9AEE/HT82M9AAE
Rev. 1.20
18
August 13, 2007
Data EEPROM Functional Description
Serial clock (SCL)
The SCLinput is used for positive edge clock data into
each EEPROM device and negative edge clock data
out of each device.
Serial data (SDA)
The SDA pin is bidirectional for serial data transfer.
The pin is open-drain driven and may be wired-OR
with any number of other open-drain or open collector
devices.
Memory Organization
1K Serial EEPROM
Internally organized with 128 8-bit words, the 1K re-
quiresan8-bitdatawordaddressforrandomwordad-
dressing.
Device Operations
Clock and data transition
Data transfer may be initiated only when the bus is not
busy. During data transfer, the data line must remain
stable whenever the clock line is high. Changes in
data line while the clock line is high will be interpreted
as a START or STOP condition.
Start condition
Ahigh-to-low transition of SDAwith SCLhigh is a start
condition which must precede any other command
(refer to Start and Stop Definition Timing diagram).
Stop condition
Alow-to-high transition of SDAwith SCLhigh is a stop
condition. After a read sequence, the stop command
will place the EEPROM in a standby power mode (re-
fer to Start and Stop Definition Timing Diagram).
Acknowledge
All addresses and data words are serially transmitted
to and from the EEPROM in 8-bit words. The
EEPROM sends a zero to acknowledge that it has re-
ceived each word. This happens during the ninth
clock cycle.
Device Addressing
The 1K EEPROM devices all require an 8-bit device ad-
dress word following a start condition to enable the chip
for a read or write operation. The device address word
consist of a mandatory one, zero sequence for the first
four most significant bits (refer to the diagram showing
the Device Address). This is common to all the
EEPROM device.
The next three bits are the fixed to be 0 .
The 8th bit of device address is the read/write operation
select bit. A read operation is initiated if this bit is high
and a write operation is initiated if this bit is low.
If the comparison of the device address succeed the
EEPROM will output a zero at ACK bit. If not, the chip will
return to a standby state.
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Byte Write Timing
相關(guān)PDF資料
PDF描述
HT82M9BAE USB Mouse Encoder 8-Bit MCU with EEPROM
HT82M9BEE USB Mouse Encoder 8-Bit MCU with EEPROM
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參數(shù)描述
HT82M9BAE 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:USB Mouse Encoder 8-Bit MCU with EEPROM
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