HT45R37
TinyPower
TM
C/R-F Type 8-Bit OTP MCU
Technical Document
·
·
·
-
Features
·
Operating voltage:
·
Dual Serial Interfaces: SPI and I
2
C
·
4 operating modes: normal, slow, idle and sleep
·
6-level subroutine nesting
·
6-channel 12-bit resolution A/D converter
·
2-channel 12-bit PWM output shared with I/O line
·
Low voltage reset function - 2.1V, 3.15V, 4.2V
·
Low voltage detect function - 2.2V, 3.3V, 4.4V
·
Bit manipulation instruction
·
15-Bit table read instructions
·
63 powerful instructions
·
Up to 0.33ms instruction cycle with 12MHz system
f
SYS
=32768Hz: 2.2V~5.5V
f
SYS
=4MHz: 2.2V~5.5V
f
SYS
=8MHz: 3.0V~5.5V
f
SYS
=12MHz: 4.5V~5.5V
·
OTP Program Memory: 4K´15
·
RAM Data Memory: 160´8
·
27 bidirectional I/O lines
·
Three external interrupt input shared with I/O lines
·
Two 8-bit programmable Timer/Event Counter
with overflow interrupt and 7-stage prescaler
·
External C/R to F converter
·
16-Channel Capacitor/Resistor sensor inputs
·
Integrated Crystal, IRC, ERC and RTC oscillator
·
Fully integrated internal RC oscillator available with
clock at V
DD
=5V
·
All instructions executed in one or two machine
cycles
·
Idle/Sleep mode and wake-up functions to reduce
three frequencies: 4MHz, 8MHz or 12MHz
·
Watchdog Timer function
·
LIRC or RTC oscillator function for watchdog timer
·
PFD and Buzzer for audio frequency generation
power consumption
·
Time-Base and RTC interrupt
·
20-pin DIP/SOP, 24/28-pin SKDIP/SOP/SSOP,
32-pin QFN and 44-pin QFP packages
General Description
The HT45R37 is a TinyPower
TM
C/R to F Type 8-bit high
performance RISC architecture microcontroller. As a C/R
to F type of MCU, the device can interface to 16 external
C or R type sensors and convert their values to a fre-
quency value for processing. In addition its internal A/D
converter allows the device to interface directly to analog
signals and its integrated dual channel Pulse Width Modu-
lators allows control of external motors, LEDs etc.
With their fully integrated SPI and I
2
C functions, design-
ers are provided with a means of easy communication
with external peripheral hardware. The benefits of inte-
grated A/D, C/R to F converter, and PWM functions, in
addition to low power consumption, high performance,
I/O flexibility and low-cost, provides the device with the
versatility for a wide range of products in the home appli-
ance and industrial application areas. Some of these
products could include electronic metering, environmen-
tal monitoring, handheld instruments, electronically con-
trolled tools, motor driving in addition to many others.
The unique Holtek TinyPower technology also gives the
devices extremely low current consumption characteris-
tics, 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 applica-
tions require a minimum of external components.
Rev. 1.20
1
February 25, 2011
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
