HT45R35V Datasheet, PDF (1/42 Pages) Holtek Semiconductor Inc – C/R to F Type 8-Bit OTP MCU

HT45R35V
C/R to F Type 8-Bit OTP MCU
Technical Document
· Tools Information
· FAQs
· Application Note
- HA0075E MCU Reset and Oscillator Circuits Application Note
Features
· Operating voltage:
f_SYS=4MHz: 2.2V~5.5V
f_SYS=8MHz: 3.3V~5.5V
· 16 bidirectional I/O lines
· Two external interrupt inputs shared with I/O lines
· 8-bit programmable timer/event counter with
overflow interrupt and 7-stage prescaler
· External RC oscillation converter
· On-chip crystal and RC oscillator
· Watchdog Timer
· 12 capacitor/resistor sensor input
· 2048´14 program memory
· 120´8 data memory RAM
· Power Down and Wake-up function reduce power
consumption
· Up to 0.5ms instruction cycle with 8MHz system clock
at V_DD=5V
· All instructions executed in one or two instruction
cycles
· 14-bit table read instruction
· Four-level subroutine nesting
· Bit manipulation instruction
· 63 powerful instructions
· Low voltage reset function
· Integrated DC 24V to 5V LDO regulator
· Buzzer and filament 5V to 24V output level shifter
· 24-bit shift register/latch for VFD panel driving 24
grid/segment outputs
· Integrated 3-line serial VFD interface for
grid/segment display control
· 52-pin QFP package type
General Description
The HT45R35V is a C/R to F Type with 8-bit high perfor-
mance RISC architecture microcontroller designed es-
pecially for VFD applications.
The usual Holtek MCU features such as power down
and wake-up functions, oscillator options, etc. combine
to ensure user applications require a minimum of exter-
nal components.
The device is specifically designed for VFD applications
that interface directly to VFD panels. The benefits of in-
tegrated C/R to F functions, in addition to low power
consumption, high performance, I/O flexibility and
low-cost, enhance the versatility of these devices to suit
a wide range of VFD application possibilities such as
household appliance timers, various consumer prod-
ucts, subsystem controllers, other home appliances etc.
Rev. 1.00
1
March 19, 2009