TC7109/A
Converter Select
Converter Select
Converter Select
GND
GND
GND
MODE CE/LOAD
MODE CE/LOAD
MODE CE/LOAD
B
- B
9 12
POL, OR
B
- B
B
B
-
9
9
12
POL, OR
12
POL, OR
6
8
6
8
6
8
TC7109A
TC7109A
B
TC7109A
B
- B
- B
B - B
1 8
1
8
1
8
Analog In
Analog In
Analog In
RUN/HOLD
LBEN
RUN/HOLD
LBEN
RUN/HOLD
LBEN
+5V
+5V
+5V
HBEN
HBEN
HBEN
Byte Select Flags
FIGURE 4-2:
Three-Stating Several TC7109As to a Small Bus
Address Bus
Control Bus
Data Bus
GND
MODE
CE/LOAD
- B
POL, OR
RD WR D7 - D0 A0 - A1
CS
PA5 - PA0
B
9
12
6
Analog In
μPD8255A
+5V
RUN/HOLD
μPD8748H/49H
(Mode 0)
TC7109A
B
- B
8
PB7 - PB0
1
8
STATUS
LBEN
PC5
See Text
HBEN
GND
FIGURE 4-3:
Full Time Parallel Interface to μPD8748H/494 Microcontrollers
DS21456C-page 18
© 2006 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
