參數(shù)資料
型號(hào)： HT82A850R
廠商： Holtek Semiconductor Inc.
英文描述： Audio MCU
中文描述： 音頻控制器
文件頁(yè)數(shù)： 16/41頁(yè)
文件大?。?/td> 296K
代理商： HT82A850R
HT82A850R
Rev. 1.10
16
July 25, 2007
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Timer/Event Counter 0/1
Input/Output Ports
There are 24 bidirectional input/output lines in the
microcontroller, labeled from PA to PC. 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 opera-
tion, 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 or
PCC) to control the input/output configuration. With this
control register, either a CMOS output or Schmitt trigger
input with or without pull-high resistor structures can be
reconfigured dynamically under software control. To
function as an input, the corresponding latch of the con-
trol register must write 1 . The input source also de-
pends on the control register. If the control register bit is
1 theinputwillreadthepadstate.Ifthecontrolregister
bit is 0 the contents of the latches will move to the in-
ternal
bus.
The
latter
is
possible
in
the
Read-modify-write
CMOS configurations can be selected.
instruction. For output function,
After a device reset, the input/output lines will default to
input high levels or a floating state, depending on the
pull-high configuration options. Each bit of these in-
put/output latches can be set or cleared using the SET
[m].i and CLR [m].i (m=12H, 14H or 16H) instruc-
tions.
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.
Low Voltage Reset
LVR
The LVR function is enabled or disabled using a configu-
ration option. The LVR voltage is 3.0V.
The microcontroller provides low voltage reset circuit in
order to monitor the supply voltage of the device. If the
supply voltage of the device is within the range
0.9V~V
LVR
such as when changing a battery, the LVR
will automatically reset the device internally.
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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
HT82A851R 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:USB Audio MCU
HT82B40A 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O MCU with USB Interface
HT82B40R 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O MCU with USB Interface
HT82B40R_11 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O MCU with USB Interface
HT82B42R 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O MCU with USB Interface
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