UPD78F0413GA-GAM-AX NEC, UPD78F0413GA-GAM-AX Datasheet - Page 294

• Manufacturer Part Number: UPD78F0413GA-GAM-AX
• Description: 8BIT UC, 32K FLASH, 1KB RAM, LCD
• Manufacturer: NEC

Specifications of UPD78F0413GA-GAM-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 30
• Ram Memory Size: 1024Byte
• Cpu Speed: 10MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 32KB
• Oscillator Type: External, Internal

12.3 Registers Used in 10-Bit Successive Approximation Type A/D Converter
(1) A/D converter mode register (ADM)
294
The A/D converter uses the following seven registers.
This register sets the conversion time for analog input to be A/D converted, and starts/stops conversion.
ADM can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears this register to 00H.
Notes 1.
A/D converter mode register (ADM)
A/D port configuration register 0 (ADPC0)
Analog input channel specification register (ADS)
Port function register 2 (PF2)
Port mode register 2 (PM2)
10-bit A/D conversion result register (ADCR)
8-bit A/D conversion result register (ADCRH)
Note Ignore data of the first conversion.
Symbol
Address: FF8DH
CHAPTER 12 10-BIT SUCCESSIVE APPROXIMATION TYPE A/D CONVERTER ( PD78F041x only)
2.
ADM
ADCS
0
0
1
1
For details of FR3 to FR0, LV1, LV0, and A/D conversion, see Table 12-2 A/D Conversion Time
Selection.
The operation of the comparator is controlled by ADCS and ADCE, and it takes 1 s from operation
start to operation stabilization. Therefore, when ADCS is set to 1 after 1 s or more has elapsed from
the time ADCE is set to 1, the conversion result at that time has priority over the first conversion
result. Otherwise, ignore data of the first conversion.
ADCS
ADCE
ADCS
<7>
0
1
0
1
ADCE
Figure 12-3. Format of A/D Converter Mode Register (ADM)
0
1
0
1
After reset: 00H
Stops conversion operation
Enables conversion operation
Stops comparator operation
Enables comparator operation
FR3
6
Note 1
Stop status (DC power consumption path does not exist)
Conversion waiting mode (comparator operation, only comparator consumes
power)
Conversion mode (comparator operation stopped
Conversion mode (comparator operation)
Table 12-1. Settings of ADCS and ADCE
FR2
User’s Manual U18698EJ1V0UD
5
R/W
Note 1
FR1
A/D conversion operation control
Comparator operation control
4
Note 1
A/D Conversion Operation
FR0
3
Note 1
LV1
2
Note 1
Note
Note 2
)
LV0
1
Note 1
ADCE
<0>