GMS82516K datasheet(39/110 Pages) HYNIX

39 / 110 page

GMS81508B/16B/24B, GMS82512/16/24

MAY. 2001 Ver 2.0

R5 and R5DD register: R5 is an 8-bit CMOS bidirection-

al I/O port (address 0CAH). Each I/O pin can independent-

ly used as an input or an output through the R5DD register

(address 0CBH).

The control register PMR5 (address D1H) controls the se-

lection alternate function. After reset, this value is “0”, port

may be used as general I/O ports. To use buzzer function,

write “1” to the PMR5 and the pin R55 must be defined as

output mode (the bit 5 of R5DD=1).

Also, Port R5 can be used to alternate function by SI-

OM(address 0EAH) and PWMCR(0F2H).

R50~R53, R56 and R57 are NOT served on GMS825xx.

R6 and R6DD register: R6 is an 8-bit CMOS bidirection-

al I/O port (address 0CCH). Each I/O pin can independent-

ly used as an input or an output through the R6DD register

(address 0CDH).

R60~R63 are NOT served on GMS825xx.

R6DD (address CDH) controls the direction of the R6 pins,

even when they are being used as analog inputs. The user

must make sure to keep the pins configured as inputs when

using them as analog inputs.

Note: On the MDS(Choice-Dr,Jr), when the MCU is RE-

SET, R60 can not be used digital input port, because this

port is selected as an analog input port by ADCM register.

To use this port as a digital I/O port, change the value of

lower 4 bits of ADCM (address 0E8H). On the other hand,

R6 port, all eight pins can not be used as digital I/O port si-

multaneously on the MDS. At least one pin is used as an

analog input. But on the OTP and Main chip, R6 port, all

eight pins can be used as digital I/O port at the same time.

Port Pin

Alternate Function

R50

R51

R52

R53

R54

R55

R56

R57

SIN(Serial data input)

SOUT(Serial data output)

SCLK(Serial clock)

SRDY(ready signal)

WDTO (Watchdog timer output)

BUZ (Square-wave output for buzzer)

PWM0

PWM1

R5 Port Mode Register

PMR5

ADDRESS: 0D1H

RESET VALUE: --00----B

R54/WDTO Selection

BUZ

0: R54

1: WDTO (Output)

R55/BUZ Selection

0: R55

1: BUZ (Output)

WD TO

R5 Data Register

ADDRESS: 0CAH

RESET VALUE: Undefined

R57 R56 R55 R54 R53 R52 R51 R50

Port Direction

R5 Direction Register

R5DD

ADDRESS: 0CBH

RESET VALUE: 00H

0: Input

1: Output

Input / Output data

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 Data Register

ADDRESS: 0CCH

RESET VALUE: Undefined

R67 R66 R65 R64 R63 R62 R61 R60

Port Direction

R6 Direction Register

R6DD

ADDRESS: 0CDH

RESET VALUE: 0000----B

0: Input

1: Output

Input / Output data

R60~R63 are input

Input data

only

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