m30262f8gp Renesas Electronics Corporation., m30262f8gp Datasheet - Page 163

• Manufacturer Part Number: m30262f8gp
• Description: Renesas 16-bit Cmos Single-chip Microcomputer M16c Family / M16c/20 Series
• Manufacturer: Renesas Electronics Corporation.

A-D Converter
Table 1.16.3. One-shot mode specifications
Figure 1.16.4. A-D conversion control registers in one-shot mode
(1) One-shot mode
Reading of A-D result
Interrupt request
generation timing
Input pin
Function
Start condition
Stop condition
In one-shot mode, the pin selected using the analog input pin select bits , is used for one-shot A-D
conversion. Table 1.16.3 shows the specifications of one-shot mode. Figure 1.16.4 shows the settings of
the A-D control registers in one-shot mode.
A-D control register 0 (Note 1)
b7
A-D control register 1 (Note 1)
b7
Note 1: If the A-D control register is rewritten during A-D conversion, the conversion result is indeterminate.
Note 2: When changing A-D operation mode, set analog input pins again.
Note 1: If the A-D control register is rewritten during A-D conversion, the conversion result is indeterminate.
Note 2: If the VCUT bit is reset from "0" (Vref unconnected) to "1" (Vref connected), wait for 1 µs or more before starting
Item
b6
b6
b5
b5
1
Preliminary Specifications Rev. 0.9
A-D conversion.
b4
0
b4
Specifications in this manual are tentative and subject to change.
b3
0
b3
b2
b2
0
Select one from AN
The pin selected by the analog input pin select bits is used for one A-D conversion
End of A-D conversion
Read A-D register that corresponds to selected analog input pin
Writing "1" to the A-D conversion start flag
• End of A-D conversion (A-D conversion start flag changes to "0" - except when
• Writing "0" to the A-D conversion start flag
b1
b1
external trigger is selected
b0
b0
Bit symbol
Bit symbol
SCAN0
SCAN1
Nothing is assigned.
In an attempt to write to these bits, write 0. The value, if read, turns out to be 0.
ADST
CKS0
VCUT
CH0
CH1
CH2
MD0
MD1
TRG
CKS1
BITS
Symbol
ADCON0
Symbol
ADCON1
MD2
0
Analog input pin select
bit
A-D operation mode
select bit 1
to AN
A-D operation mode
select bit 0
Trigger select bit
A-D conversion start flag 0 : A-D conversion disabled
Frequency select bit 0
A-D sweep pin
select bit
8/10-bit mode select bit
Frequency select bit1
Vref connect bit (Note 2)
Renesas Technology Corp.
7
Bit name
Bit name
Address
Address
03D6
03D7
Specification
16
16
Set to 0 when this mode is selected
Refer to table 1.16.2
Invalid in one-shot mode
0 : 8-bit mode
1 : 10-bit mode
1 : Vref connected
0 0 : One-shot mode
00000XXX
b2 b1 b0
0 0 0 : AN
0 0 1 : AN
0 1 0 : AN
0 1 1 : AN
1 0 0 : AN
1 0 1 : AN
1 1 0 : AN
1 1 1 : AN
b4 b3
0 : Software trigger
1 : AD
1 : A-D conversion started
Refer to table 1.16.2
When reset
When reset
00
TRG
16
0
1
2
3
4
5
6
7
trigger
is selected
is selected
is selected
is selected
is selected
is selected
is selected
is selected
2
Function
Function
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(Note 2)
(Note 2)
R
R
W
W
M16C/26 Group
157