TC7109/A
Serial Output
Serial Input
6402 CMOS UART
RBR1 - RBR8
TBRL DRR TBRE
SFD TBR1 - TBR8
2
3
GND
8-Bit Data Bus
MODE CE/ SEND
LOAD
MODE CE/ SEND
LOAD
MODE CE/ SEND
LOAD
B
- B
12
POL, OR
B
- B
9 12
B
- B
12
POL, OR
9
9
6
8
6
8
6
8
POL, OR
Analog In
Analog In
Analog In
B
- B
- B
TC7109AB
TC7109A
TC7109A B
1
8
- B
1
8
1
8
RUN/HOLD
LBEN
+5V
RUN/HOLD
LBEN
+5V
RUN/HOLD
LBEN
+5V
HBEN
HBEN
HBEN
FIGURE 4-7:
Handshake Interface for Multiplexed Converters
2
3
40
39
38
37
36
35
34
33
32
31
30
29
28
27
25
24
23
22
21
XTAL1
XTAL2
–
+5V
V+
REF IN-
REF CAP-
REF CAP+
1
2
1
+5V
T0
GND
GND
TEST
External
Reference
1μF
1MΩ
4
5
6
17
RESET
SS
21-24,
35-38
+
P20 - P27
REF IN+
IN HI
8
5
+
INT
μPD8748H/49H
CMOS
Microcomputer
Input
–
0.01μF
Other I/O
HI LO
COM
Analog
GND
C
TC7109A
7
31-34
INT
GND
P14 - P17
EA
INT
AZ
C
0.15μF
AZ
10
9
WR
0.33μF
30
29
28
27
26
2
BUFF
REF OUT
V-
PSEN
ALE
P13
P12
P11
P10
RUN/HOLD
STATUS
LBEN
11
R
INT
25
18
19
20kΩ 0.2 V
10 kΩ 1 V
REF
+5V
-5V
PROG
REF
26
+5V
SEND
V
HBEN
DD
39
+5V
BUFF OSC OUT
OSC SEL
T1
V
B
- B ,
12
POL, OR
40
3-8
9
+5V
GND
CC
6
OSC OUT
OSC IN
3.58MHz
Crystal
12-19
8
9-16
20
B
- B
8
DB0 - DB7
RD
1
8
8
20
GND
CE/LOAD
GND
MODE
FIGURE 4-8:
Connection Diagram
© 2006 Microchip Technology Inc.
DS21456C-page 21
MICROCHIP [ MICROCHIP ]
