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4-5
OPERATION
DACC2000 USER'S MANUAL (ENG-015 Rev. 1)
reference. The resistor divider network contains a thermistor which compensates the charging
setpoint as the ambient temperature varies.
VBATT
O
1
O
2
O
3
O
4
O
5
O
6
O
7
O
8
TB1
F1
3 A
F2
3 A
F3
5 A
VCHGR
0=charge
AUX POWER
SWITCH
RADIO POWER
SWITCH
CHARGER
SWITCH
AUX+
GND
RAD+
GND
CHGR
GND
BATT
GND
FIGURE 4.6
DACC2000 POWER SWITCHING SIMPLIFIED SCHEMATIC
4.2.7 Display Interface
The DACC2000 has a display interface to drive a character display. It includes a temperature
compensated bias circuit (generating VO in Figure 4.7) to keep the contrast adjusted over
ambient temperature variations.
+5V
t
WR-
RD-
DISPCS-
-5.5V
D0
D1
D2
D3
D4
D5
D6
A1
A2
A3
A4
A5
A6
A7
A8
G
DIR
B1
B2
B3
B4
B5
B6
B7
B8
RS
VO
E
R/W
+5V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TO LC
DISPLAY
D7
RD-
DEN
FIGURE 4.7
DACC2000 DISPLAY INTERFACE SIMPLIFIED SCHEMATIC
Summary of Contents for DACC2000
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