EM78P159NKM Просмотр технического описания (PDF) - ELAN Microelectronics

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EM78P159NKM

8-Bit Microcontroller with OTP ROM

ELAN Microelectronics 

EM78P159N

8-Bit Microcontrollerwith OTP ROM

4.2.3 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 7 bits of IOC5 can be defined.

„ IOC5 and IOC6 registers are both readable and writable.

4.2.4 IOCA (Prescaler Counter Register)

„ IOCA register is readable.

„ The value of IOCA is equal to the contents of Prescaler counter.

„ Down counter

4.2.5 IOCB (Pull-Down Control Register)

Bit 7

/PD7

Bit 6

/PD6

Bit 5

/PD5

Bit 4

/PD4

Bit 3

/PD3

Bit 2

/PD2

Bit 1

/PD1

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 (/PD3): Control bit is used to enable the pull-down of P53 pin.

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 (/PD7): Control bit is used to enable the pull-down of P63 pin.

IOCB Register is both readable and writable.

Bit 0

/PD0

12 •

Product Specification (V1.0) 03.10.2006

(This specification is subject to change without further notice)

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