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參數(shù)資料
| 型號： | HT82M9BEE |
| 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 |
| 文件頁數(shù)： | 16/47頁 |
| 文件大?。?/td> | 336K |
| 代理商： | HT82M9BEE |
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HT82M9BEE/HT82M9BAE
Rev. 1.20
16
August 13, 2007
operate until overflow occurs (a Timer/Event Counter 0/1
reloading will occur at the same time). When the
Timer/Event Counter 0/1 (reading TMR0/TMR1) is read,
theclockwillbeblockedtoavoiderrors.Asclockblocking
may results in a counting error, this must be taken into
consideration by the programmer.
Input/Output Ports
There are 20 bidirectional input/output lines in the
microcontroller, labeled from PA to PC, which are
mapped to the data memory of [12H], [14H] and [16H]
respectively. All of these I/O ports can be used for input
and output operations. For input operation, these ports
are non-latching, that is, the inputs must be ready at the
T2 rising edge of instruction MOV A,[m] (m=12H, 14H
or 16H). For output operation, all the data is latched and
remains unchanged until the output latch is rewritten.
Each I/O line has its own control register (PAC, PBC and
PCC) to control the input/output configuration. With this
control register, CMOS/NMOS/PMOS output or Schmitt
trigger input with or without pull-high/low resistor struc-
tures can be reconfigured dynamically under software
control. To function as an input, the corresponding latch
of the control register must write a 1 . The input source
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Input/Output Ports
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Timer/Event Counter 1
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