Fujitsu MB90390 Series, Hardware Manual

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CHAPTER 18 8/10-BIT A/D CONVERTER
18.4.1 Analog Input Enable / A/D Converter Select Register
The MB90390 series has 15 analog inputs but only one A/D converter with 8 inputs.
Therefore, the special bit ADSEL can be used to select the analog input channels.
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Upper Bits of the Analog Input Enable / A/D Converter Select Register (ADER1)
Figure 18.4-2 Configuration of the Upper Bits of Analog Input Enable / A/D Converter Select Register
(ADER1)
■
Lower Bits of the Analog Input Enable Register (ADER0)
Figure 18.4-3 Configuration of the Lower Bits of the Analog Input Enable Register (ADER0)
AD S EL ADE14 ADE1 3 ADE12 ADE11 ADE10 ADE9 ADE 8
Initi a l v a l u e
01111111
B
Addre ss
00000D
H
b it14 b it15 b it1 3 b it12 b it11 b it10 b it9 b it 8
R/W R/W R/W R/W R/W R/W R/W R/W
AD S EL A/D converter inp u t s election b it
0 AN0 to AN7 (Port 6) a re s elected as inp u t s .
1 AN 8 to AN14 (Port B) a re s elected as inp u t s .
ADEx
0
1
An a log inp u t mode (Initi a l v a l u e).
R/W : Re a d ab le a nd writ ab le
: Initi a l v a l u e
An a log inp u t en ab le b it s
Port inp u t mode (Port B).
ADE7 ADE6 ADE5 ADE4 ADE3 ADE2 ADE1 ADE0
Initial value
11111111
B
Address
00000C
H
bit6 bit7 bit5 bit4 bit3 bit2 bit1 bit0
R/W R/W R/W R/W R/W R/W R/W R/W
ADEx Analog input enable bits
0 Port input mode (Port 6).
1 Analog input mode (Initial value).
R/W : Readable and w ritable
: Initial value