HT48R0662G View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT48R0662G' PDF : 126 Pages View PDF
HT48R064G/065G/066G/0662G
Enhanced I/O Type 8-Bit OTP MCU with OPA
Operational Amplifier Offset Cancellation Function
Each of the internal OPAs allows for a common mode adjustment method of its input offset voltage.
A0RS
0
0
1
1
A0OFM
0
1
0
1
S1A
ON
OFF
ON
ON
S2A
ON
ON
ON
OFF
S3A
OFF
ON
OFF
ON
S 1A
A 0P
S 2A S 3A
A 0N
A 0O F0~A 0O F3
A 0E N
A 0X
A 0O P
A1RS
0
0
1
1
A1OFM
0
1
0
1
S1B
ON
OFF
ON
ON
S 1B
A 1P
S 2B S 3B
A 1N
1 .5 k W
A 1O F0~A 1O F3
A 1E N
A 1X
S2B
ON
ON
ON
OFF
A 1O P
S3B
OFF
ON
OFF
ON
The calibration steps are as following:
1. Set A0OFM=1 to setup the offset cancellation mode, here S3A is closed.
2. Set A0RS to select which input pin is to be used as the reference voltage - S1 or S2 is closed
3. Adjust A0OF0~A0OF3 until the output status changes
4. Set A0OFM = 0 to restore the normal OPA mode
5. Repeat the same procedure from steps 1 to 4 for OPA1.
Rev. 1.10
80
October 23, 2012
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