MC-78F0712-KIT Renesas Electronics America, MC-78F0712-KIT Datasheet - Page 205

• Manufacturer Part Number: MC-78F0712-KIT
• Description: KIT REF SYSTEM 78K0 UPD78F0712
• Manufacturer: Renesas Electronics America

Specifications of MC-78F0712-KIT

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

<R>
(1) A/D converter mode register (ADM)
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 input clears this register to 00H.
Notes 1.
Remark
2.
f
X
Select the A/D conversion time in the combination of FR2 to FR0, ADHS1, and ADHS0.
For details of A/D conversion time, see Table 13-3.
A booster circuit is incorporated to realize low-voltage operation. The operation of the circuit that
generates the reference voltage for boosting is controlled by ADCS2, 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 ADCS2 is set to 1, the conversion result at that time has priority over the first conversion
result.
: X1 input clock oscillation frequency
Symbol
Address: FF6CH
ADM
Figure 13-3. Format of A/D Converter Mode Register (ADM)
ADCS2
ADMD
ADCS
ADCS
FR2
0
0
0
0
1
1
1
1
0
0
0
0
1
0
1
0
1
0
1
Stops conversion operation
Enables conversion operation
Select mode
Scan mode
Stops operation of reference voltage generator
Enables operation of reference voltage generator
After reset: 00H
ADMD
FR1
0
0
1
1
0
0
1
1
0
0
1
1
CHAPTER 13 A/D CONVERTER
Boost reference voltage generator operation control
User’s Manual U17890EJ2V0UD
FR2
FR0
0
1
0
1
0
1
0
1
0
1
0
1
Note 1
A/D conversion operation control
R/W
FR1
ADHS1
Operation mode control
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
Note 1
FR0
ADHS0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
Note 1
ADHS1
Setting prohibited
Setting prohibited
96/f
72/f
48/f
24/f
224/f
168/f
112/f
56/f
72/f
54/f
36/f
18/f
Setting prohibited
A/D conversion time selection
X
X
X
X
X
X
X
X
X
X
X
X
Note 1
ADHS0
Note 2
Note 1
ADCS2
203