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參數(shù)資料
| 型號(hào)： | HT48CA1 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | Remote Type 8-Bit MCU |
| 中文描述： | 遠(yuǎn)程型8位微控制器 |
| 文件頁數(shù)： | 17/39頁 |
| 文件大?。?/td> | 308K |
| 代理商： | HT48CA1 |
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HT48RA1/HT48CA1
Rev. 1.00
17
June 25, 2004
After a chip reset, these input/output lines stay at high
levels (pull-high options) or floating state (non-pull-high
options). Each bit of these input/output latches can be
set or cleared by SET[m].i (m=12H, 14H, 16H or 1CH)
instructions. Some instructions first input data and then
follow the output operations. For example, SET [m].i ,
CLR [m].i , CPLA [m] read the entire port states into
theCPU,executethedefinedoperations(bit-operation),
and then write the results back to the latches or the ac-
cumulator.
Each line of port A has the capability of waking-up the
device. The highest 2 bits of port C and 7 bits of port F
are not physically implemented; on reading them a 0 is
returned whereas writing then results in a no-operation.
Pull-high resistors of each port are decided by a option
bit.
The PB0 is pin-shared with PFD signal, respectively. If
the PFD option is selected, the output signal in output
mode of PB0 will be the PFD signal. The input mode al-
ways remain its original functions. The PF0 and PC0 are
pin-shared with INT and TMR0. The INT signal is di-
rectly connected to PF0. The PFD output signal (in out-
put mode) are controlled by the PB0 data register only.
The truth table of PB0/PFD is listed below.
PBC (15H) Bit0
I
O
O
O
PB0/PFD option
x
PB0
PFD
PFD
PB0 (14H) Bit0
x
D
0
1
PB0 pad status
I
D
0
PFD
Note:
I Input
O Output
D Data
Low Voltage Reset
LVR
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 changing a battery, the LVR will au-
tomatically reset the device internally.
The LVR includes the following specifications:
The low voltage (0.9V~V
LVR
) has to remain in their
original state to exceed 1ms. If the low voltage state
does not exceed 1ms, the LVR will ignore it and do not
perform a reset function.
The LVR uses the OR function with the external
RES signal to perform chip reset.
TherelationshipbetweenV
DD
andV
LVR
isshownbelow.
C
C
C
0
C
0
C
* 4
, & ) ! "
*
D
D
% ' ! " 4
+
! * , % )
*
0
4
* * 4
% " * ! &
Low Voltage Reset
Note:
*1 To make sure that the system oscillator has stabilized, the SST provides an extra delay of 1024 system
clock pulses before entering the normal operation.
*2 Sincelowvoltagehastobemaintainedinitsoriginalstateandexceed1ms,therefore1msdelayenters
the reset mode.
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| HT48RA1 | Remote Type 8-Bit MCU |
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| HT48E06 | 8-Bit I/O Type MCU (With EEPROM) |
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| HT48CA3 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Remote Type 8-Bit MCU |
| HT48CA5 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Remote Type 8-Bit MCU |
| HT48CA6 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:8-Bit Remote Type Low Voltage Mask MCU |
| HT48CU80 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O Type 8-Bit MCU |
| HT48CXX | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:8-Bit Microcontroller Series |
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