HT48C50- Datasheet, PDF (1/45 Pages) Holtek Semiconductor Inc – 8-Bit Microcontroller

Preliminary
HT48C50-1
8-Bit Microcontroller
Features
· Operating voltage:
f_SYS=4MHz: 2.4V~5.5V
f_SYS=8MHz: 4.5V~5.5V
· Low voltage reset function
· 35 bidirectional I/O lines (max.)
· 1 interrupt input shared with an I/O line
· 8-bit programmable timer/event counter with
overflow interrupt and 8-stage prescaler
· 16-bit programmable timer/event counter
and overflow interrupts
· On-chip RC oscillator, external crystal and
RC oscillator
· 32768Hz crystal oscillator for timing
purposes only
· Watchdog Timer
General Description
The device is an 8-bit high performance
RISC-like microcontroller designed for multi-
ple I/O product applications. The device is par-
ticularly suitable for use in products such as
· 4096´15 program memory ROM
· 160´8 data memory RAM
· Buzzer driving pair and PFD supported
· Halt function and wake-up feature reduce
power consumption
· 6-level subroutine nesting
· Up to 0.5ms instruction cycle with 8MHz
system clock at V_DD=5V
· Bit manipulation instruction
· 15-bit table read instruction
· 63 powerful instructions
· All instructions in one or two machine
cycles
· 28-pin SKDIP and 40-pin DIP package
remote controllers, fan/light controllers, wash-
ing machine controllers, scales, toys and vari-
ous subsystem controllers. A HALT feature is
included to reduce power consumption.
1
June 14, 2000