
Rev.2.00 Oct 16, 2006
page 223 of 354
REJ09B0340-0200
M30245 Group
2. A/D Converter
b7
b0
1
Setting A/D conversion start flag
AD control register 0 [Address 03D616]
ADCON0
A/D conversion start flag
1 : A/D conversion started
Transmitting conversion result to AD register i
Eight low-order bits of A/D conversion result
b7
b0
(b15)
(b8)
b7
b0
During 10-bit mode
Two high-order bits of A/D conversion result
During 8-bit mode
When read, the content is indeterminate
b7
b0
Setting AD control register 0 and AD control register 1
AD control register 0 [Address 03D616]
ADCON0
Analog input pin select bit (Note 1)
0 0 0 : AN0 is selected
0 0 1 : AN1 is selected
0 1 0 : AN2 is selected
0 1 1 : AN3 is selected
1 0 0 : AN4 is selected
1 0 1 : AN5 is selected
1 1 0 : AN6 is selected
1 1 1 : AN7 is selected
b2 b1 b0
b7
b0
AD control register 1 [Address 03D716]
ADCON1
A/D operation mode select bit 1 (Note 1)
0 (Must always be “0” in repeat mode)
8/10-bit mode select bit
0 : 8-bit mode
1 : 10-bit mode
Repeat mode is selected (Note 1)
A/D conversion start flag
0 : A/D conversion disabled
0
00
1
Invalid in Repeat mode
Vref connect bit
1 : Vref connected
00
0
1
Trigger select bit
0 : Software trigger
Start A/D conversion
b7
b0
0
Setting A/D conversion start flag
AD control register 0 [Address 03D616]
ADCON0
A/D conversion start flag
0 : A/D conversion disabled
Stop A/D conversion
Note 1 : Rewrite to analog input pin select bit after changing A/D operation mode.
Note 2 : When f(XIN) is over 10 MHz, the fAD frequency must be under 10 MHz by dividing and set AD frequency to 10 MHz or lower.
Repeatedly carries out A/D conversion on pins
selected through the A/D input pin select bit.
b7
b0
Selecting Sample and hold
AD control register 2 [Address 03D416]
ADCON2
A/D conversion method select bit
1 : With sample and hold
Must always be set to “0”
1
0
00
Reserved bit
AD register 0[Address 03C116, 03C016]AD0
AD register 1[Address 03C316, 03C216]AD1
AD register 2[Address 03C516, 03C416]AD2
AD register 3[Address 03C716, 03C616]AD3
AD register 4[Address 03C916, 03C816]AD4
AD register 5
[Address 03CB16, 03CA16]AD5
AD register 6
[Address 03CD16, 03CC16]AD6
AD register 7[Address 03CF16, 03CE16]AD7
Frequency select bit 1 (Note 2)
0 : fAD/2 or fAD/4 is selected
1 : fAD or fAD/3 is selected
Frequency select bit 0 (Note 2)
0 : fAD/3 or fAD/4 is selected
1 : fAD or fAD/2 is selected
Figure 2.9.9. Set-up procedure of repeat mode