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參數(shù)資料
| 型號： | HT48RA3 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | 8-Bit Remote Type OTP MCU |
| 中文描述： | 8位單片機的遠程型檢察官辦公室 |
| 文件頁數(shù)： | 14/36頁 |
| 文件大小： | 245K |
| 代理商： | HT48RA3 |
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HT48RA3
Rev. 1.20
14
May 12, 2003
Timer/Event Counter 1 preload register. The
Timer/Event Counter 1 will still operate until the overflow
occurs (a Timer/Event Counter 1 reloading will occur at
the same time).
When the Timer/Event Counter 1 (reading TMR1H) is
read, the clock will be blocked to avoid errors. As this
may results in a counting error, this must be taken into
consideration by the programmer.
The definitions of the TMR1C are as shown.
(Label
Function
0~2 Unused bit, read as 0
TE
3
To define the active edge of TMR1 pin
input signal
(0/1:activeonlowtohigh/hightolow)
TON
4
To enable/disable timer 1 counting
(0/1: disabled/enabled)
5
Unused bit, read as 0
TM0
TM1
6
7
To define the operating mode
01=Eventcountmode(externalclock)
10=Timer mode (internal clock)
11=Pulse width measurement mode
00=Unused
TMR1C register
Input/Output Ports
There are 23 bi-directional input/output lines in the mi-
cro-controller, labeled from PA to PC and PF, which are
mapped to the data memory of [12H], [14H], [16H] and
[1CH], respectively. All of these I/O ports can be used as
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, 16H or 1CH). 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, PFC) to control the input/output configuration.
With this control register, CMOS output or Schmitt trig-
ger input with or without (depends on options) pull-high
resistorstructurescanbereconfigureddynamically(i.e.,
on-the fly) under software control. To function as an in-
put,thecorrespondinglatchofthecontrolregisterhasto
be set as 1 . The pull-high resistor (if the pull-high re-
sistor is enabled) will be exhibited automatically. The in-
put sources also depends on the control register. If the
control register bit is 1 , the input will read the pad state
( mov and read-modify-write instructions ). If the con-
trol register bit is 0, the contents of the latches will move
to internal data bus ( mov and read-modify-write in-
structions). The input paths (pad state or latches) of
read-modify-write instructions are dependent on the
control register bits. For output function, CMOS is the
only configuration. These control registers are mapped
to locations 13H, 15H, 17H and 1DH.
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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 |
|---|---|
| HT48RA3_07 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Remote Type 8-Bit MCU |
| HT48RA3_09 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:HT48RA3/HT48CA3 |
| HT48RA5 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Remote Type 8-Bit MCU |
| HT48RA5_07 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Remote Type 8-Bit MCU |
| HT48RA5_09 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Remote Type 8-Bit MCU |
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