EM78P153EN datasheet(11/38 Pages) EMC

Part #	EM78P153EN

Description	EM78P153E is an 8-bit microprocessor with low-power and high-speed CMOS technology

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Manufacturer	EMC [ELAN Microelectronics Corp]

Direct Link	http://www.emc.com.tw

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EM78P153E

OTP ROM

This specification is subject to change without prior notice.

2002/03/01

11

1: enabled by ENI/RETI instructions

• Bit 7 Not used.

• CONT register is both readable and writable.

3. IOC5 ~ IOC6 (I/O Port Control Register)

• "1" put the relative I/O pin into high impedance, while "0" defines the relative I/O pin as output.

• Only the lower 4 bits of IOC5 are available to be defined.

• IOC5 and IOC6 registers are both readable and writable.

4. IOCB (Pull-down Control Register)

7

6

5

4

3

2

1

0

-

/PD6

/PD5

/PD4

-

/PD2

/PD1

/PD0

• Bit 0 (/PD0) Control bit is used to enable the pull-down of P50 pin.

0: Enable internal pull-down

1: Disable internal pull-down

• Bit 1 (/PD1) Control bit is used to enable the pull-down of P51 pin.

• Bit 2 (/PD2) Control bit is used to enable the pull-down of P52 pin.

• Bit 3

Not used.

• Bit 4 (/PD4) Control bit is used to enable the pull-down of P60 pin.

• Bit 5 (/PD5) Control bit is used to enable the pull-down of P61 pin.

• Bit 6 (/PD6) Control bit is used to enable the pull-down of P62 pin.

• Bit 7

Not used.

• IOCB Register is both readable and writable.

5. IOCC (Open-drain Control Register)

7

6

5

4

3

2

1

0

OD7

OD6

OD5

OD4

-

OD2

OD1

OD0

• Bit 0 (OD0) Control bit is used to enable the open-drain of P60 pin.

0: Disable open-drain output

1: Enable open-drain output

• Bit 1 (OD1) Control bit is used to enable the open-drain of P61 pin.

• Bit 2 (OD2) Control bit is used to enable the open-drain of P62 pin.

• Bit 3

Not used.

• Bit 4 (OD4) Control bit is used to enable the open-drain of P64 pin.

• Bit 5 (OD5) Control bit is used to enable the open-drain of P65 pin.

• Bit 6 (OD6) Control bit is used to enable the open-drain of P66 pin.

• Bit 7 (OD7) Control bit is used to enable the open-drain of P67 pin.

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