- 您現在的位置：買賣IC網 > PDF目錄385404 > HT82M9AAE (Holtek Semiconductor Inc.) USB Mouse Encoder 8-Bit MCU with EEPROM PDF資料下載
參數資料
| 型號： | HT82M9AAE |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | USB Mouse Encoder 8-Bit MCU with EEPROM |
| 中文描述： | USB鼠標編碼器8位微控制器帶有EEPROM |
| 文件頁數： | 19/48頁 |
| 文件大小： | 330K |
| 代理商： | HT82M9AAE |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁當前第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁
HT82M9AEE/HT82M9AAE
Rev. 1.20
19
August 13, 2007
Write Operations
Byte write
A write operation requires an 8-bit data word address
following the device address word and acknowledg-
ment. Upon receipt of this address, the EEPROM will
again respond with a zero and then clock in the first
8-bit data word. After receiving the 8-bit data word, the
EEPROM will output a zero and the addressing de-
vice, such as a microcontroller, must terminate the
write sequence with a stop condition. At this time the
EEPROM enters an internally-timed write cycle to the
non-volatile memory. All inputs are disabled during
this write cycle and EEPROM will not respond until the
write is completed (refer to Byte write timing).
Acknowledge polling
Tomaximisebusthroughput,onetechniqueistoallow
the master to poll for an acknowledge signal after the
start condition and the control byte for a write com-
mand have been sent. If the device is still busy imple-
menting its write cycle, then no ACK will be returned.
The master can send the next read/write command
when the ACK signal has finally been received.
Read operations
The data EEPROM supports three read operations,
namely, current address read, random address read
and sequential read. During read operation execution,
the read/write select bit should be set to 1 .
Current address read
The internal data word address counter maintains the
last address accessed during the last read or write op-
eration, incremented by one. This address stays valid
betweenoperationsaslongasthechippowerismain-
tained. The address roll over during read from the last
byte of the last memory page to the first byte of the
first page. The address roll over during write from the
last byte of the current page to the first byte of the
same page. Once the device address with the
read/write select bit set to one is clocked in and ac-
knowledged by the EEPROM, the current address
data word is serially clocked out. The microcontroller
should respond a No ACK (High) signal and following
stop condition (refer to Current read timing).
Random read
Arandomreadrequiresadummybytewritesequence
to load in the data word address which is then clocked
in and acknowledged by the EEPROM. The
microcontroller must then generate another start con-
dition. The microcontroller now initiates a current ad-
dress read by sending a device address with the
read/write select bit high. The EEPROM acknowl-
edges the device address and serially clocks out the
data word. The microcontroller should respond with a
no ACK signal (high) followed by a stop condition.
(refer to Random read timing).
# ( +
(
#
# (
(
#
(
( +
(
!
,
# (
# (
, , ( - !
C
$ (
) +
F 3
:
F 3 ; G
< (
'
"
Acknowledge Polling Flow
@
( # #
" "
(
Current Read Timing
@
( # #
" "
+
# ( # #
" "
(
@
( # #
" "
Random Read Timing
相關PDF資料 |
PDF描述 |
|---|---|
| HT82M9AEE | USB Mouse Encoder 8-Bit MCU with EEPROM |
| HT82M9BAE | USB Mouse Encoder 8-Bit MCU with EEPROM |
| HT82M9BEE | USB Mouse Encoder 8-Bit MCU with EEPROM |
| HT82P604B | DC-DC Converter |
| HT82V14 | 14-Bit CCD/CIS Analog Signal Processor(14位CCD/CIS模擬信號處理器) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| HT82M9AE | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:USB Mouse Encoder 8-Bit MCU |
| HT82M9AE_09 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:USB Mouse Encoder 8-Bit MCU |
| HT82M9AEE | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:USB Mouse Encoder 8-Bit MCU with EEPROM |
| 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 |
| HT82M9BEE | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:USB Mouse Encoder 8-Bit MCU with EEPROM |
發布緊急采購，3分鐘左右您將得到回復。