參數(shù)資料
型號(hào)： HT82K96E
廠商： Holtek Semiconductor Inc.
英文描述： 8-Bit USB Multimedia Keyboard Encoder OTP MCU
中文描述： 8位USB多媒體鍵盤(pán)編碼器檢察官辦公室單片機(jī)
文件頁(yè)數(shù)： 17/46頁(yè)
文件大?。?/td> 325K
代理商： HT82K96E
HT82K96E
Rev. 1.70
17
April 22, 2004
Input/Output Ports
There are 32 bidirectional input/output lines in the
microcontroller, labeled from PA to PD, which are
mapped to the data memory of [12H], [14H], [16H] and
[18H] 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 MOVA,[m] (m=12H,
14H, 16H or 18H). 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,
PCC, PDC) to control the input/output configuration.
With this control register, CMOS/NMOS/PMOS output
or Schmitt trigger input with or without pull-high/low re-
sistor structures can be reconfigured dynamically (i.e.
on-the-fly) under software control. To function as an in-
put, the corresponding latch of the control register must
write 1 . The input source also depends on the control
register. If the control register bit is 1 , the input will
read the pad state. If the control register bit is 0 , the
contents of the latches will move to the internal bus. The
latter is possible in the read-modify-write instruction.
For output function, CMOS/NMOS/PMOS configura-
tions can be selected (NMOS and PMOS are available
for PAonly). These control registers are mapped to loca-
tions 13H, 15H, 17H and 19H.
Afterachipreset,theseinput/outputlinesremainathigh
levels or floating state (depending on the pull-high/low
options). Each bit of these input/output latches can be
set or cleared by SET [m].i and CLR [m].i (m=12H,
14H, 16H or 18H) instructions.
Some instructions first input data and then follow the
output operations. For example,
SET [m].i ,
CLR
[m].i , CPL [m] , CPLA[m] read the entire port states
into the CPU, execute the defined operations
(bit-operation), and then write the results back to the
latches or the accumulator.
Each line of port A has the capability of waking-up the
device.
There are pull-high/low (PA only) options available for
I/O lines. Once the pull-high/low option of an I/O line is
selected, the I/O line have pull-high/low resistor. Other-
wise, the pull-high/low resistor is absent. It should be
noted that a non-pull-high/low I/O line operating in input
mode will cause a floating state.
It is recommended that unused or not bonded out I/O
linesshouldbesetasoutputpinsbysoftwareinstruction
to avoid consuming power under input floating state.
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Input/Output Ports
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HT82K96E_07 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:USB Multimedia Keyboard Encoder 8-Bit OTP MCU
HT82M13 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Mouse/Trackball Controller
HT82M21A 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:3-Key 3D USB+PS/2 Optical Mouse Controller
HT82M21A_05 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:3-Key 3D USB+PS/2 Optical Mouse Controller
HT82M22 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:5-Key 3D USB+PS/2 Optical Mouse Controller
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