HT45R22E Holtek Semiconductor, HT45R22E Datasheet - Page 42

• Manufacturer Part Number: HT45R22E
• Description: Remote Type 8-bit OTP MCU
• Manufacturer: Holtek Semiconductor

Operational Amplifier Operation
The advantages of multiple switches and input path op-
tions, various reference voltage selection, up to 8 kinds of
internal software gain control, output with interrupt func-
tion, offset reference voltage calibration function and
power down control for low power consumption enhance
the flexibility of these two OPAs to suit a wide range of ap-
plication possibilities.
A0N
A0P
A0X
A1N
A1P
A1X
Rev. 1.00
CX
CN
CP
0.7VDD
0.5VDD
0.1VDD
0.7VDD
0.5VDD
0.1VDD
0.7VDD
0.5VDD
0.1VDD
S24
S11
S13
CPS[2:0]
A0PS[2:0]
A1NS[1:0]
A1PS[2:0]
CNS[1:0]
MUX
MUX
MUX
MUX
MUX
MA0P
MA1N
MA1P
MCN
MCP
S21
10K
R1
R2
A0
A1
C
500K
S22
S12
S23
debounce
A0X
42
A1X
Note that the EA0I, EA1I interrupt control bits should be
set to 0 before entering halt mode for power saving.
The following block diagram illustrates the main func-
tional blocks of the OPAs and Comparator in this device.
POL
EA0I
EA1I
To OPA0 interrupt
To OPA1 interrupt
TC0 pin
(COUT)
CX
CINTS[1:0]
control
Edge
TMR0S
mux
=00: rasing edge
=01: falling edge
=10: both edge
HT45R22E
March 17, 2010
to interrupt
To timer 0 external
clock input
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