10/19

¡ Semiconductor

MSM82C53-2RS/GS/JS

• Example of control word and count value setting

Counter #0: Read/Load LSB only, Mode 3, Binary count, count value 3H

Counter #1: Read/Load MSB only, Mode 5, Binary count, count value AA00H

Counter #2: Read/Load LSB and MSB, Mode 0, BCD count, count value 1234

MVI A, 1EH

OUT n3

Counter #0 control word setting

MVI A, 6AH

OUT n3

Counter #1 control word setting

MVI A, B1H

OUT n3

Counter #2 control word setting

MVI A, 03H

OUT n0

Counter #0 control value setting

MVI A, AAH

OUT n1

Counter #1 control value setting

MVI A, 34H

OUT n2

Counter #2 count value setting (LSB then MSB)

MVI A, 12H

OUT n2

Notes: n0: Counter #0 address

n1: Counter #1 address

n2: Counter #2 address

n3: Control word register address

1

2

3

0

Mode

Remarks

1

2

2

1

MIn.

0

0

1

0

Max,

4

5

1

1

0

0

0 executes 10000H count (ditto in other modes)

—

1 cannot be counted

1 executes 10001H count

—

—

• The minimum and maximum count values which can be counted in each mode are listed

below.