APPLICATIONS
18.1 Application example of A-D converter
Setting of pin AN
9
to one-shot mode (Note)
Continued from preceding Figure 18.1.1.
b7
b0
A-D control register 2
(Address DB16
Analog input pin select bits 1
0
0 0 0 1 0 0 1
)
b3 b2
b1 b0
1
0 0 1: Pin AN9 is selected.
Setting of pin AN
8
to one-shot mode
b7
b0
A-D control register 0
0
0 0 0
➀ ➀
➀
Interrupt disabled, no interrupt requested
(Address 1E16
)
b7
b0
One-shot mode
A-D conversion interrupt control register
0
0
0
0
(Address 7016
)
A-D conversion start bit
0 : A-D conversion halts.
Interrupt disabled
No interrupt requested
A-D conversion frequency (
See Table 12.2.1.
φAD) select bit 0
b7
b0
A-D control register 1
Setting of A-D conversion start bit to “1.”
0
0
1 0
➀ ➀
(Address 1F16
)
b7
b0
A-D control register 0
(Address 1E16
Resolution select bit
1 : 10-bit resolution mode
1
)
A-D conversion frequency (
φAD) select bit 1
A-D conversion starts.
See Table 12.2.1.
VREF connection select bit
0 : Pin VREF is connected.
Trigger generated, A-D conversion started
b7
b0
A-D control register 2
(Address DB16
Analog input pin select bits 1
0
0
0
0
0 0 0
1
)
0: During A-D
conversion.
A-D conversion
interrupt request
bit = “1” ?
b3 b2
b1 b0
1
0 0 0: Pin AN8 is selected.
➀: It may be either “0” or “1.”
1: A-D conversion, using one-shot
mode with pin AN , is completed.
9
Interrupt disabled, no interrupt requested
b7
b0
A-D conversion interrupt control register
0
0
0
0
(Address 7016
)
Interrupt disabled
No interrupt requested
Setting of pin AN10 to one-shot mode (Note)
b7
b0
A-D control register 2
(Address DB16
Analog input pin select bits 1
0
0
0
0
1
0
1
0
)
Setting of A-D conversion start bit to “1.”
b3 b2
b1 b0
b7
b0
1
0 1 0: Pin AN10 is selected.
A-D control register 0
(Address 1E16
1
)
A-D conversion starts.
Interrupt disabled, no interrupt requested
b7
b0
A-D conversion interrupt control register
0
0
0
0
Trigger generated, A-D conversion started
(Address 7016
)
Interrupt disabled
No interrupt requested
0: During A-D
conversion.
A-D conversion
interrupt request
bit = “1” ?
Setting of A-D conversion start bit to “1.”
b7
b0
A-D control register 0
(Address 1E16
1
)
1: A-D conversion, using one-shot
mode with pin AN , is completed.
A-D conversion starts.
8
Trigger generated, A-D conversion started
0: During A-D
conversion.
A-D conversion
interrupt request
bit = “1” ?
1: A-D conversion, using one-shot
mode with pin AN10, is completed.
Continued on Figure 18.1.3.
Fig. 18.1.2 Application example of A-D converter, using single sweep mode with pins AN to AN11 (2)
0
7905 Group User’s Manual Rev.1.0
18-4
RENESAS [ RENESAS TECHNOLOGY CORP ]
