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HT48RA3 Datasheet

  • HT48RA3

  • 8-Bit Remote Type OTP MCU

  • 36頁

  • HOLTEK

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HT48RA3
8-Bit Remote Type OTP MCU
Features
路
Operating voltage: 2.2V~3.6V
路
23 bidirectional I/O lines (max.)
路
1 interrupt input shared with an I/O line
路
8-bit programmable timer/event counter with overflow
路
PFD supported
路
HALT function and wake-up feature reduce power
consumption
路
8-level subroutine nesting
路
Up to 1ms instruction cycle with 4MHz system clock at
interrupt and 8-stage prescaler (TMR0)
路
16-bit programmable timer/event counter and over-
V
DD
=3V
路
Bit manipulation instruction
路
16-bit table read instruction
路
63 powerful instructions
路
All instructions in one or two machine cycles
路
28-pin SKDIP/SOP package
flow interrupts (TMR1)
路
On-chip crystal and RC oscillator
路
Watchdog Timer
路
24K麓16 program memory EPROM
(8K麓16 bits麓3 banks)
路
224麓8 data memory RAM
General Description
This device is an 8-bit high performance RISC-like MCU
designed for multiple I/O product applications. The de-
vice is particularly suitable for use in products such as
universal remote controller (URC). A HALT feature is in-
cluded to reduce power consumption. The data ROM
can be used to store codes of remote control.
Block Diagram
T M R 1 C
M
U
X
IN T /P . 0
T M R 1
f
S
Y S
/4
T M R 1
In te rru p t
C ir c u it
P ro g ra m
C o u n te r
B P
S T A C K
IN T C
T M R 0 C
T M R 0
M
U
X
P r e s c a le r
T M R 0
f
S
Y S
P ro g ra m
E P R O M
E N /D IS
In s tr u c tio n
R e g is te r
M P
M
U
X
W D T S
D A T A
M e m o ry
W D T P r e s c a le r
W D T
M
U
X
W D T O S C
P A C
In s tr u c tio n
D e c o d e r
A L U
T im in g
G e n e ra to r
S h ifte r
M U X
P A
P . D
P B C
P B
P C C
O S C 2
O S C 1
R E S
V D D
V S S
A C C
P C
P O R T C
P O R T B
P B 0 ~ P B 7
P O R T A
f
S
Y S
/4
P A 0 ~ P A 7
S T A T U S
P C 0 ~ P C 5
P . C
P .
P O R T .
P . 0
Rev. 1.20
1
May 12, 2003

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