GMS81032 datasheet(34/101 Pages) HYNIX

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3 - 2

3.2 PORT R1

PIN NAME

R10

R11/INT1

R12/INT2

R13

R14/EC

R15/T2

R16/T1

R17/T0

Fig 3.1 Pin Function of port R1

PORT SELECTION

FUNCTION SELECTION

R10(I/O)

R11(I/O)

R12(I/O)

R13(I/O)

R14(I/O)

R15(I/O)

R16(I/O)

R17(I/O)

INT1 (INPUT)

INT2 (INPUT)

(INPUT)

T2 (OUTPUT)

T1 (OUTPUT)

T0 (OUTPUT)

R1 I/O Data Direction Register

SYMBOL

R/W

RESET VALUE

ADDRESS

R1DD

00H

00C3H

R1 Data Register

R/W

Undefined

00C2H

Table 3.1 Port R1 Registers

3.2.1 PORT R1 Register

R1 Port Mode Register

PMR1

00H

00C9H

R1 Port Open drain Assign

R10DC

00H

00CEH

3.2.2 I/O Data Direction Register (R1DD)

R1DD7

R1DD6

R1DD5

R1DD4

R1DD3

R1DD2

R1DD1

R1DD0

<00C3H>

R1DD

bit

initial value

R/W

R1 Data Direction Register(R1DD) is 8-bit register, and can assign input state or output

state to each bit. If R1DD is ¡È1¡È, port R1 is in the output state, and if ¡È0¡È, it is in the

input state. R1DD is write-only register. Since R1DD is initialized as ¡È00H¡È in reset

state, the whole port R1 becomes input state.

Chapter 3. I/O PORT

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