HT45F12(2012) データシートの表示（PDF） - Holtek Semiconductor
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HT45F12 Datasheet PDF : 104 Pages
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HT45F12
8-Bit Flash MCU with Op Amps & Comparators
General Description
The device is Flash Memory Tinypower Type 8-bit high performance RISC architecture microcontroller.
Offering users the convenience of Flash Memory multi-programming features, this device also
includes a wide range of functions and features. Other memory includes an area of RAM Data
Memory as well as an area of EEPROM memory for storage of non-volatile data such as calibration
data etc.
Analog features include dual Operational Amplifiers, dual Comparators and one internal 2.4V or
3.3V LDO (Low Drop Out) for voltage regulator. Protective features such as an internal Watchdog
Timer and Low Voltage Reset ensure that reliable operation is maintained in hostile electrical
environments.
A full choice of HXT, ERC, HIRC and LIRC oscillator functions are provided including a fully
integrated system oscillator which requires no external components for its implementation. The
unique Holtek TinyPower technology also gives the device extremely low current consumption
characteristics, an extremely important consideration in the present trend for low power battery
powered applications. The usual Holtek MCU features such as power down and wake-up functions,
oscillator options, programmable frequency divider, etc. combine to ensure user applications require
a minimum of external components.
The inclusion of flexible I/O programming features, Time-Base functions along with many other
features ensure that the device will find excellent use in applications such as electronic metering,
environmental monitoring, handheld instruments, electronically controlled tools, motor driving and
many others.
Block Diagram
The following block diagram illustrates the main functional blocks.
F la s h /E E P R O M
P r o g r a m m in g
C ir c u itr y ( IC P )
F la s h
P ro g ra m
M e m o ry
EEPRO M
D a ta
M e m o ry
T im e
B a s e 0 /1
RAM
D a ta
M e m o ry
P F D /B u z z e r
D r iv e r
I/O
T im e r
C o m p a ra to rs
O PAs
W a tc h d o g
T im e r
8 - b it
R IS C
M CU
C o re
H IR C
O s c illa to r
LD O
R eset
C ir c u it
In te rru p t
C o n tr o lle r
E R C /H X T
O s c illa to r
L IR C
O s c illa to r
Rev. 0.00
7
September 26, 2012
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