GMS81C2012 datasheet(41/107 Pages) HYNIX

41 / 107 page

HYUNDAI MicroElectronics

GMS81C2012/GMS81C2020

MAR. 2000 Ver 1.00

R5 and R5IO register: R5 is an 8-bit bidirectional I/O

port (address 0CAH). Each pin can be set individually as

input and output through the R5IO register (address

0CBH).In addition, Port R5 is multiplexed with Pulse

Width Modulator (PWM).

The control register R5FUNC (address 0F6H) controls to

select PWM function.After reset, the R5IO register value

is "0", port may be used as general I/O ports. To select

PWM function, write "1" to the corresponding bit of

R5FUNC.

The control register R5NODR (address 0F9H) controls to

select N-MOS open drain port. To select N-MOS open

drain port, write "1" to the corresponding bit of R5FUNC.

R6 and R6IO register: R6 is an 8-bit bidirectional I/O

port (address 0CCH). Each port can be set individually as

input and output through the R6IO register (address

0CDH). R67~R60 ports are multiplexed with Analog Input

Port.

The control register R6FUNC (address 0F7H) controls to

select alternate function. After reset, this value is "0", port

may be used as general I/O ports. To select alternate func-

tion such as Analog Input, write "1" to the corresponding

bit of R6FUNC. Regardless of the direction register R6IO,

R6FUNC is selected to use as alternate functions, port pin

can be used as a corresponding alternate features

(AN7~AN0)

Port Pin

Alternate Function

R56

PWM1 Data Output

Timer 1 Data Output

R5 Data Register

ADDRESS: 0CAH

RESET VALUE: Undefined

R57 R56 R55 R54 R53 R52 R51 R50

R5 Direction Register

R5IO

ADDRESS : 0CBH

RESET VALUE : 00H

Input / Output data

R5 Function Selection Register

R5FUNC

ADDRESS : 0F6H

RESET VALUE : -0------B

0: R56

R5 N-MOS Open Drain

R5NODR

ADDRESS: 0F9H

RESET VALUE: 00H

N-MOS Open Drain Selection

Selection Register

0: Disable

1: Enable

Port Direction

0: Input

1: Output

PWM1O/T1O

Port Pin

Alternate Function

R60

R61

R62

R63

R64

R65

R66

R67

AN0 (ADC input 0)

AN1 (ADC input 1)

AN2 (ADC input 2)

AN3 (ADC input 3)

AN4 (ADC input 4)

AN5 (ADC input 5)

AN6 (ADC input 6)

AN7 (ADC input 7)

R6 Function Selection Register

R6FUNC

ADDRESS : 0F7H

RESET VALUE : 00H

0: R60

1: AN0

0: R61

1: AN1

0: R63

1: AN3

0: R62

1: AN2

0: R65

1: AN5

0: R64

1: AN4

0: R66

1: AN6

0: R67

1: AN7

R6 Data Register

ADDRESS: 0CCH

RESET VALUE: Undefined

R67 R66 R65 R64 R63 R62 R61 R60

Input / Output data

R6 Direction Register

R6IO

ADDRESS : 0CDH

RESET VALUE : 00H

Port Direction

0: Input

1: Output

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