HT48RA0A
8-Bit Remote Type OTP MCU
Features
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Operating voltage: 2.2V~3.6V
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Ten bidirectional I/O lines
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Six Schmitt trigger input lines
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One carrier output (1/2 or 1/3 duty)
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On-chip crystal and RC oscillator
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Watchdog Timer
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1K麓14 program EPROM
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32麓8 data RAM
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HALT function and wake-up feature reduce power
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62 powerful instructions
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Up to 1ms instruction cycle with 4MHz system clock
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All instructions in 1 or 2 machine cycles
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14-bit table read instructions
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One-level subroutine nesting
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Bit manipulation instructions
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20-pin/24-pin SOP package
consumption
General Description
The HT48RA0A is an 8-bit high performance RISC-like
microcontroller specifically designed for multiple I/O
product applications. The device is particularly suitable
for use in products such as infrared remote controllers
and various subsystem controllers. A HALT feature is
included to reduce power consumption.
Block Diagram
S T A C K
P ro g ra m
E P R O M
P ro g ra m
C o u n te r
S Y S C L K /4
In s tr u c tio n
R e g is te r
M P
M
U
X
D A T A
M e m o ry
. r e q u e n c y D iv id e r
W D T
L e v e l o r C a r r ie r
C a r r ie r C o n tr o l
P C 0 C o n tro l
P C 0 /R E M
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
M U X
P O R T B
P B
S T A T U S
P B 0 ~ P B 1
P B 2 ~ P B 7
S h ifte r
P A
O S C 2
O S
R E
V D
V S
S
P O R T A
P A 0 ~ P A 7
C 1
S
D
A C C
Rev. 1.50
1
April 9, 2002