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參數(shù)資料
| 型號： | HT48C06 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | Cost-Effective I/O Type 8-Bit MCU |
| 中文描述： | 成本效益的I / O型8位微控制器 |
| 文件頁數(shù)： | 14/38頁 |
| 文件大?。?/td> | 264K |
| 代理商： | HT48C06 |
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HT48R05A-1/HT48C05/HT48R06A-1/HT48C06
Rev. 1.10
14
June 9, 2004
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Input/Output Ports
transient occurs again. In other words, only one cycle
measurement can be done. Until setting the TON, the
cycle measurement will function again as long as it re-
ceives further transient pulse. Note that, in this operat-
ing mode, the timer/event counter starts counting not
according to the logic level but according to the transient
edges. In the case of counter overflows, the counter is
reloaded from the timer/event counter preload register
and issues the interrupt request just like the other two
modes. To enable the counting operation, the timer ON
bit (TON; bit 4 of TMRC) should be set to 1. In the pulse
width measurement mode, the TON will be cleared au-
tomatically after the measurement cycle is completed.
But in the other two modes the TON can only be reset by
instructions. The overflow of the timer/event counter is
one of the wake-up sources. No matter what the opera-
tion mode is, writing a 0 to ETI can disable the interrupt
service.
In the case of timer/event counter OFF condition, writing
data to the timer/event counter preload register will also
reload that data to the timer/event counter. But if the
timer/event counter is turned on, data written to it will
only be kept in the timer/event counter preload register.
The timer/event counter will still operate until overflow
occurs. When the timer/event counter (reading TMR) is
read, the clock will be blocked to avoid errors. As clock
blocking may results in a counting error, this must be
taken into consideration by the programmer.
The bit0~2 of the TMRC can be used to define the
pre-scaling stages of the internal clock sources of the
timer/event counter. The definitions are as shown. The
overflow signal of the timer/event counter can be used
to generate PFD signals for buzzer driving.
Input/Output Ports
There are 13 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,
PCC) to control the input/output configuration. With this
control register, CMOS output or Schmitt trigger input
with or without pull-high resistor structures can be re-
configured dynamically (i.e. on-the-fly) under software
control. To function as an input, the corresponding latch
of the control register must write 1 . The input source
also depends on the control register. If the control regis-
ter bit is 1 , the input will read the pad state. If the con-
trol 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 is the only configuration.
These control registers are mapped to locations 13H,
15H and 17H.
Afterachipreset,theseinput/outputlinesremainathigh
levels or floating state (dependent on pull-high options).
Each bit of these input/output latches can be set or
cleared by SET [m].i and CLR [m].i (m=12H, 14H or
16H) instructions.
Some instructions first input data and then follow the
output operations. For example,
SET [m].i ,
CLR
相關PDF資料 |
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|---|---|
| HT48C10-1 | 8-Bit High Performance RISC-like Microcontroller Suitable for Multiple I/O Application(高性能、指令類似RISC的8位微控制器，用于多I/O接口設備) |
| HT48C50-1 | 8-Bit High Performance RISC-like Microcontroller Suitable for Multiple I/O Application(高性能、指令類似RISC的8位微控制器，用于多I/O接口設備) |
| HT48C50- | 8-BIT MICROCONTROLLER |
| HT48C70-1 | I/O Type 8-Bit MCU |
| HT48R70A-1 | I/O Type 8-Bit MCU |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT48C062 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:八位高性能精簡指令集單片機，專為經(jīng)濟型多輸入輸出控制的產(chǎn)品設計 |
| HT48C062_08 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Cost-Effective I/O Type 8-Bit MCU |
| HT48C10 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:8-Bit Microcontroller Series |
| HT48C10(18DIP-F) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| HT48C10(20DIP-F) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
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