參數(shù)資料
型號(hào)： HT48CA0
廠商： Holtek Semiconductor Inc.
元件分類： 8位微控制器
英文描述： 8-BIT MICROCONTROLLER
中文描述： 8位微控制器
文件頁(yè)數(shù)： 11/32頁(yè)
文件大?。?/td> 238K
代理商： HT48CA0
HT48RA0-2/HT48CA0-2
Rev. 1.50
11
July 23, 2004
Code Option
The following table shows eight kinds of code option in the HT48RA0-2/HT48CA0-2. All the code options must be de-
fined to ensure proper system functioning.
No.
Code Option
1
WDT time-out period selection
Time-out period=
2
Clock Source
n
, where n=8~11.
2
WDT enable/disable selection. This option is to decide whether the WDT timer is enabled or disabled.
3
CLR WDT times selection. This option defines how to clear the WDT by instruction. One time means that the
CLR WDT instruction can clear the WDT. Two times means only if both of the CLR WDT1 and CLR WDT2 in-
structions have been executed, the WDT can be cleared.
4
Wake-up selection. This option defines the wake-up activity function. External input pins (PB only) all have the
capability to wake-up the chip from a HALT.
5
Carrier/level output selection. This option defines the activity of PC0 to be carrier output or level output.
6
Carry frequency selection.
Carry frequency=
Clock Source
(2 or 3) 2
n
, where n=0~3.
7
Carrier duty selection. There are two types of selection: 1/2 duty or 1/3 duty.
If carrier frequency=Clock Source/(2, 4, 8 or 16), the duty cycle will be 1/2 duty.
If carrier frequency=Clock Source/3, the duty cycle will be 1/3 duty.
If carrier frequency=Clock Source/(6, 12 or 24), the duty cycle can be 1/2 duty or 1/3 duty.
8
System oscillator selection. RC or crystal oscillator.
9
LVR function: enable or disable
2 F 3
$ F 4
$
#
1
G
G
6
1 #
#
#
1
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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