HT48CA0-2 Holtek Semiconductor, HT48CA0-2 Datasheet - Page 3

• Manufacturer Part Number: HT48CA0-2
• Description: (HT48RA0-2 / HT48CA0-2) Remote Type 8-Bit MCU
• Manufacturer: Holtek Semiconductor

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D.C. Characteristics
A.C. Characteristics
Note: t
Functional Description
Execution Flow
The HT48RA0-2/HT48CA0-2 system clock can be de-
rived from a crystal/ceramic resonator oscillator. It is in-
ternally divided into four non-overlapping clocks. One
instruction cycle consists of four system clock cycles.
Rev. 1.50
Symbol
V
I
I
V
V
V
V
V
I
I
R
Symbol
f
t
t
t
DD
STB
OL
OH
SYS
RES
SST
LVR
DD
IL1
IH1
IL2
IH2
LVR
PH
SYS
=1/f
Operating Voltage
Operating Current
Standby Current
Input Low Voltage for I/O Ports
Input High Voltage for I/O Ports
Input Low Voltage (RES)
Input High Voltage (RES)
Low Voltage Reset Voltage
I/O Ports Sink Current
PC0/REM Output Source Current
Pull-high Resistance
System Clock
External Reset Low Pulse Width
System Start-up Timer Period
Low Voltage Width to Reset
SYS
Parameter
Parameter
V
V
3V
3V
3V
3V
3V
3V
3V
3V
3V
3V
DD
DD
Execution Flow
No load, f
No load, system HALT
V
V
Power-up, reset or wake-up
from HALT
OL
OH
Test Conditions
Test Conditions
=0.1V
=0.9V
3
Conditions
Conditions
Instruction fetching and execution are pipelined in such
a way that a fetch takes one instruction cycle while de-
coding and execution takes the next instruction cycle.
However, the pipelining scheme causes each instruc-
tion to effectively execute within one cycle. If an instruc-
tion changes the program counter, two cycles are
required to complete the instruction.
SYS
DD
DD
=4MHz
HT48RA0-2/HT48CA0-2
0.7V
0.9V
Min.
Min.
400
2.0
20
0
0
4
1
1
2
DD
DD
1024
Typ.
Typ.
0.7
1.9
60
8
4
0.3V
0.4V
Max.
Max.
4000
V
V
100
3.6
1.5
2.0
1
DD
DD
July 23, 2004
DD
DD
Ta=25 C
Ta=25 C
Unit
Unit
t
kHz
mA
mA
mA
k
ms
SYS
V
V
V
V
V
V
A
s