M306H2MC-XXXFP Datasheet, PDF (140/210 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with DATA ACQUISITION CONTROLLER

MITSUBISHI MICROCOMPUTERS
M306H2MC-XXXFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
with DATA ACQUISITION CONTROLLER
(4) Repeat sweep mode 0
In repeat sweep mode 0, the pins selected using the A-D sweep pin select bit are used for repeat
sweep A-D conversion. Table 2.12.5 shows the specifications of repeat sweep mode 0. Figure 2.12.7
shows the A-D control register in repeat sweep mode 0.
Table 2.12.5 Repeat sweep mode 0 specifications
Item
Specification
Function
The pins selected by the A-D sweep pin select bit are used for repeat sweep A-D conversion
Start condition
Writing “1” to A-D conversion start flag
Stop condition
Writing “0” to A-D conversion start flag
Interrupt request generation timing None generated
Input pin
AN0 and AN1 (2 pins), AN0 to AN3 (4 pins), AN0 to AN5 (6 pins), or AN0 to AN7 (8 pins)
Reading of result of A-D converter Read A-D register corresponding to selected pin (at any time)
A-D control register 0 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
11
Symbol
ADCON0
Address When reset
03D616 00000XXX2
Bit symbol
Bit name
Function
CH0
Analog input pin select bit Invalid in repeat sweep mode 0
RW
CH1
CH2
MD0
MD1
A-D operation mode
select bit 0
b4 b3
1 1 : Repeat sweep mode 0
TRG
Trigger select bit
0 : Software trigger
1 : ADTRG trigger
ADST
A-D conversion start flag 0 : A-D conversion disabled
1 : A-D conversion started
CKS0
Frequency select bit 0
0 : fAD/4 is selected
1 : fAD/2 is selected
Note: If the A-D control register is rewritten during A-D conversion, the conversion result
is indeterminate.
A-D control register 1 (Note 1)
b7 b6 b5 b4 b3 b2 b1 b0
1 00
Symbol
ADCON1
Address
03D716
When reset
0016
Bit symbol
SCAN0
SCAN1
MD2
Bit name
A-D sweep pin select bit
A-D operation mode
select bit 1
F unction
When single sweep and repeat sweep mode 0
are selected
b1 b0
0 0 : AN0, AN1 (2 pins)
0 1 : AN0 to AN3 (4 pins)
1 0 : AN0 to AN5 (6 pins)
1 1 : AN0 to AN7 (8 pins)
0 : Any mode other than repeat sweep mode 1
Reserved bit
Must always be set to "0" .
CKS1
VCUT
OPA0
OPA1
Frequency select bit 1
Vref connect bit
External op-amp
connection mode
bit (Note 2)
0 : fAD/2 or fAD/4 is selected
1 : fAD is selected
1 : Vref connected
b7 b6
0 0 : ANEX0 and ANEX1 are not used
0 1 : ANEX0 input is A-D converted
1 0 : ANEX1 input is A-D converted
1 1 : External op-amp connection mode
RW
Note 1: If the A-D control register is rewritten during A-D conversion, the conversion result is
indeterminate.
Note 2: Neither “01” nor “10” can be selected with the external op-amp connection mode bit.
Figure 2.12.7 A-D conversion register in repeat sweep mode 0
Rev. 1.0
139