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HT48R30A bảng dữ liệu(PDF) 21 Page - Holtek Semiconductor Inc

tên linh kiện HT48R30A
Giải thích chi tiết về linh kiện  8-Bit Microcontroller
PDF  43 Pages
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nhà sản xuất  HOLTEK [Holtek Semiconductor Inc]
Trang chủ  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT48R30A bảng dữ liệu(HTML) 21 Page - Holtek Semiconductor Inc

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HT48R30A-1
Rev. 1.10
21
July 2, 2001
ROM code option
The following table shows all kinds of ROM code option in the microcontroller. All of the ROM code
options must be defined to ensure proper system functioning.
Items
Option
1
WDT clock source: WDTOSC/fTID/RTCOSC/disable
2
CLRWDT instructions: 1 or 2 instructions
3
Timer/event counter clock sources: fSYS or RTCOSC
4
PA wake-up (By bit)
5
PA CMOS/SCHMITT input
6
PA, PB, PC, PG pull-high enable/disable (By port)
7
BZ/BZ enable/disable
8
LVR enable/disable
9
System oscillator
Ext. RC, Ext.crystal, Int.RC+RTC or Int.RC+PG1/PG2
10
Int.RC frequency selection 3.2MHz, 1.6MHz, 800kHz or 400kHz
11
Lock: unlock/lock
V DD
5. 5V
V LV R
0. 9V
0V
R e s e t S i gnal
Re s e t
*1
*2
N o rm a l O p e ra t i o nR e s e t
LV R D e t e c t V ol t age
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: Since low voltage has to be maintained in its original state and exceed 1ms, therefore 1ms
delay enters the reset mode.



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