HT46R94 Datasheet, PDF (1/62 Pages) Holtek Semiconductor Inc – A/D Type 8-Bit MCU with 16
16 High Current LED Driver

HT46R94
A/D Type 8-Bit MCU with 16´16 High Current LED Driver
Technical Document
· Tools Information
· FAQs
· Application Note
- HA0003E Communicating between the HT48 & HT46 Series MCUs and the HT93LC46 EEPROM
- HA0049E Read and Write Control of the HT1380
- HA0075E MCU Reset and Oscillator Circuits Application Note
Features
· Operating voltage:
f_SYS=32768Hz: 2.2V~5.5V
f_SYS=4MHz: 2.2V~5.5V
f_SYS=8MHz: 3.3V~5.5V
· 8 bidirectional I/O lines
· Max. 16´16 LED driver output
· 8 LED shared I/O lines
· 24 LED shared output
· External dual edge triggered interrupt input shared
with I/O line
· Two 8-bit programmable Timer/Event Counters with
overflow interrupt
· RC/XTAL and 32768Hz crystal oscillators
· Dual clock system offers three operating modes
- Normal mode: Both RC/XTAL and 32768Hz clock
active
- _{Slow mode: 32768Hz clock only}
- _{Power-down mode can have periodical wake-up}
using the watchdog timer overflow
· _{Watchdog Timer}
· 4096´15 program memory
· 192´8 data memory
· PFD for audio frequency generation
· Power down and wake-up functions to reduce
power consumption
· Up to 0.5ms instruction cycle with 8MHz system
clock at V_DD=5V
· 8-level subroutine nesting
· 8 channel 12-bit resolution A/D converter
· 3 channel 8-bit PWM output shared with I/O lines
· 1/2 bias 4 common LCD
· Bit manipulation instruction
· Table read instructions
· 63 powerful instructions
· All instructions executed in one or two machine
cycles
· _{Low voltage reset function}
· _{44/52-pin QFP package}
General Description
The HT46R94 is an 8-bit high performance RISC archi-
tecture microcontroller, the device is designed espe-
cially for applications that interface directly to analog
signals, such as those from sensors. The devices in-
clude an integrated multi-channel Analog to Digital Con-
verter in addition to two Pulse Width Modulation
outputs. An internal high current LED driver circuit also
provides for easy interfacing to applications which con-
tain LED displays.
The usual Holtek MCU features such as power down
and wake-up functions, oscillator options, programma-
ble frequency divider, etc. combine to ensure user appli-
cations require a minimum of external components.
The benefits of integrated A/D and PWM functions, in
addition to low power consumption, high performance,
I/O flexibility and low-cost, provides the device with the
versatility to suit a wide range of application possibilities
such as sensor signal processing, motor driving, indus-
trial control, consumer products, subsystem controllers,
etc.
As is the case with all Holtek microcontroller devices,
the HT46R94 is fully supported by a full suite of
professional hardware and software tools, containing
comprehensive features to ensure user applications are
designed and debugged in as short a time as possible.
Rev. 1.10
1
November 5, 2008