UPD17073 NEC, UPD17073 Datasheet - Page 99

• Manufacturer Part Number: UPD17073
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM
• Manufacturer: NEC

13.2 Setting A/D Converter Power Supply
flag of the LCD driver display start register.
reset
At
Remark R: Retained
Cautions 1. When the LCD display is ON (LCDEN = 1), the A/D converter power supply is ON regardless
The PD17073 has a power supply for the A/D converter. This power supply is also used for LCD display.
When using the A/D converter, therefore, the A/D converter power supply must be set to ON by using the ADCON
Figure 13-2 shows the configuration and function of the LCD driver display start register.
LCD driver display
start register
Power-ON
Clock stop
CE
Name
2. Bit 3 of the LCD driver display start register is a test mode area. Therefore, do not write “1”
of the setting of the ADCON flag.
to this bit.
Figure 13-2. Configuration of LCD Driver Display Start Register
b
0
0
3
Flag symbol
b
0
0
2
b
A
D
O
N
C
0
0
1
1
0
0
0
1
b
D
N
L
C
E
0
1
0
1
R
0
0
0
A/D converter power supply OFF, LCD display OFF
A/D converter power supply ON, LCD display ON
A/D converter power supply ON, LCD display OFF
A/D converter power supply ON, LCD display ON
Fixed to “0”.
(BANK1)
Address
50H
Turns ON/OFF A/D converter power supply and all LCD displays
Read/
Write
R/W
PD17072,17073
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