
Rev.2.00 Oct 16, 2006
page 221 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
Reading conversion result
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 one-shot mode)
8/10-bit mode select bit
0 : 8-bit mode
1 : 10-bit mode
One-shot mode is selected (Note 1)
A/D conversion start flag
0 : A/D conversion disabled
1
00
0
Invalid in one-shot mode
Vref connect bit
1 : Vref connected
0
1
Trigger select bit
1 : ADTRG trigger
Start A/D conversion
When ADTRG pin level becomes from “H” to “L”
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.
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 2.9.7. Set-up procedure of one-shot mode, with an external trigger selected