3-109

TELCOM SEMICONDUCTOR, INC.

7

6

5

4

3

1

2

8

TC7109

TC7109A

12-BIT

ANALOG-TO-DIGITAL CONVERTERS

TC7109A

MODE

B9–B12

POL, OR

B1–B8

ANALOG

IN

CE/LOAD

GND

8

6

MC6800

OR

MCS650X

CONTROL

BUS

ADDRESS

BUS

HBEN

DATA

BUS

74C42

74C30

RUN/HOLD

+5V

LBEN

A0–A2

A15–A10

R/W, VMA

Figure 18. TC7109A Direct Interface to MC6800 Bus

TC7109A

B9–B12

POL, OR

B1–B8

CE/LOAD

SEND

RUN/HOLD

MODE

8

6

8255

(MODE 1)

RD WR

D7–D0

PC

A0–A1

CS

PA7–PA0

PC4

PC5

PC6

PC7

INTR

87C48

8008, 8080,

8085, 8048, ETC.

DATA BUS

CONTROL BUS

ADDRESS BUS

ANALOG

IN

STBA

PC3

IBFA

Figure 19. TC7109A Handshake Interface to MCS-48, -80, -85 Microcomputers