3-107

TELCOM SEMICONDUCTOR, INC.

7

6

5

4

3

1

2

8

TC7109A

MODE

CE/LOAD

B9–B12

POL, OR

B1–B8

STATUS

RUN/HOLD

LBEN

HBEN

GND

GND

8

6

SEE TEXT

8255

(MODE 0)

RD WR

D7–D0

A0–A1

CS

PA5–PA0

PB7–PB0

PC5

87C48

8008, 8080,

8085, 8048, ETC.

DATA BUS

CONTROL BUS

ADDRESS BUS

ANALOG

IN

+5V

Figure 14. Full-Time Parallel Interface to MCS-48, -80, -85 Microcomputers

TC7109A

MODE

CE/LOAD

B9–B12

POL, OR

B1–B8

STATUS

RUN/HOLD

LBEN

HBEN

GND

GND

8

6

+5V

(SEE TEXT)

1

µF

8255

RD WR

D7–D0

PC6

A0–A1

CS

PA5–PA0

PB7–PB0

PC4

STBA

PC6

INTR

87C48

8008, 8080,

8085, 8048, ETC.

DATA BUS

CONTROL BUS

ADDRESS BUS

INTRA

ANALOG

IN

10k

Ω

Figure 15. Full-Time Parallel Interface to MCS-48, -80, -85 Microcomputers With Interrupt

TC7109

TC7109A

12-BIT

ANALOG-TO-DIGITAL CONVERTERS