HT45F43 datasheet(102/152 Pages) HOLTEK

102 / 152 page

OPA2C2 Register

- HT45F23/HT45F43

Bit

76543210

Name

A1O2A2N

A1O2A2P

¾¾

PGAEN

PGA2

PGA1

PGA0

R/W

¾¾

R/W

POR

¾¾

0000

Bit 7

A1O2A2N: OPA1 output to OPA2 Inverting input control bit

0: disable

1: enable

Bit 6

A1O2A2P: OPA1 output to OPA2 Non-inverting input control bit

0: disable

1: enable

Bit 5~4

unimplemented, read as

²0²

Bit 3

PGAEN: OPA2 PGA gain enable control bits

0: disable

1: enable

Bit 2~0

PGA2,PGA1,PGA0: OPA2 Gain control bits

000: 1

001: 8

010: 16

011: 24

100: 32

101: 40

110: 48

111: 56

Operational Amplifier Operation

The advantages of multiple switches and input path options, various reference voltage selection, up to

8 kinds of internal software gain control, 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

application possibilities.

The following block diagram illustrates the main functional blocks of the OPAs and Comparator in this

device.

Rev. 1.20

102

September 15, 2011

HT45F23/HT45F43

8-Bit Flash MCU with Op Amps & Comparators

A2N

A2E

A1N

A1P

0.9VLDO

0.1VLDO

MUX

10K

560K

A1NS

A1O2N

A2O2N

A1PSEL[1:0]

A1OP

A1PS

A1OEN

A2OP

A2OEN

A1E

A1O2A2N

A1O2A2P

A2P

A2NS

PGAEN

A2PS

A1O2CIN

A2O2CIN

C2OUTEN

C1OUTEN

CINTO

C1INTEN

C2INTEN

C1NSEL

C2PSEL

C1OUT

C2OUT

C1N

C2P

CNP

CNPSEL

CMP1OP

CMP2OP

Edge

Select

CMPES[1:0]

CMPINT

CINTO

MUX

0.9VLDO

0.1VLDO

MUX

A2PSEL[1:0]

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