EM78P5840/5841/5842

8-bit Micro-controller

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* This specification is subject to change without notice.

19

2004/11/10

V2.6

PAGE1 (P6* pins switch control register)

7

6

5

4

3

2

1

0

X

0

P65S

P64S

P63S

P62S

P91S

P90S

-

R/W-0

R/W-0

R/W-0

R/W-0

R/W-0

R/W-0

R/W-0

ADC channel 1 and channel 2 are shared with PORT90 and PORT91.

Bit 0(P90S) : Select normal I/O PORT90 pin or channel 1 input AD1 pin of ADC

0

P90 (I/O PORT90) pin is selected

1

AD1 (Channel 1 input of ADC) pin is selected

Bit 1(P91S) : Select normal I/O PORT91 pin or channel 2 input AD2 pin of ADC

0

P91 (I/O PORT91) pin is selected

1

AD2 (Channel 2 input of ADC) pin is selected

Bit 2(P62S) : Select normal I/O PORT62 pin or channel 3 input AD3 pin of ADC

0

P62 (I/O PORT62) pin is selected

1

AD3 (Channel 3 input of ADC) pin is selected

Bit 3(P63S) : Select normal I/O PORT63 pin or channel 4 input AD4 pin of ADC

0

P63 (I/O PORT63) pin is selected

1

AD4 (Channel 4 input of ADC) pin is selected

Bit 4(P64S) : Select normal I/O PORT64 pin or channel 5 input AD5 pin of ADC

0

P64 (I/O PORT64) pin is selected

1

AD5 (Channel 5 input of ADC) pin is selected

Bit 5(P65S) : Select normal I/O PORT65 pin or channel 6 input AD6 pin of ADC

0

P65 (I/O PORT65) pin is selected

1

AD5 (Channel 6 input of ADC) pin is selected

Bit 6: Unused register. Please clear this bit to 0 or ADC result will wronging.

Bit 7: Unused register. This bit is nor allowed to use.

IOC7 (PORT7 I/O control, PORT7 pull high control)

PAGE0 (PORT7 I/O control register)

7

6

5

4

3

2

1

0

X

IOC76

IOC75

IOC74

IOC73

X

X

IOC70

-

R/W-1

R/W-1

R/W-1

R/W-1

-

-

R/W-1

Bit0(IOC70): PORT70 pin will defined to general purpose IO, PLLC or OSC by setting code option. In IRC

mode or crystal mode(only at code option P70S =0 ), PORT70 pin will be a general purpose IO. IOC70 is

PORT70 pin’s I/O direction control register.

0

put the relative I/O pin as output

1

put the relative I/O pin into high impedance

Bit1 (Unused) : This bit is unused registers. By setting P71S = 1 in code option, PORT71 pin will be a INPUT

only pin.

Bit2; Bit7 (Unused) : These 2 bits must clear to 0 or MCU power consumption will increase.

The default value in these 3 bits are “1”. Please clear them to “0” when init MCU.

Bit3~Bit6 (IOC73~IOC76) : PORT7 I/O direction control register

0

put the relative I/O pin as output

1

put the relative I/O pin into high impedance

PAGE1 (PORT7 pull high control register)

7

6

5

4

3

2

1

0

X

PH76

PH75

PH74

PH73

X

X

PH70

-

R/W-0

R/W-0

R/W-0

R/W-0

-

-

R/W-0

Bit0: PORT70 pull high control register. This bit only exist on setting PORT70 general purpose IO.

0

disable pull high function.

1

enable pull high function

Bit1, Bit7 (Unused): These2 bits must clear to 0 or MCU power consumption will increase.

Bit3~Bit6 : PORT7 pull high control register