M306H2MC-XXXFP Datasheet, PDF (138/210 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
(2) Repeat mode
In repeat mode, the pin selected using the analog input pin select bit is used for repeated A-D conver-
sion. Table 2.12.3 shows the specifications of repeat mode. Figure 2.12.5 shows the A-D control
register in repeat mode.
Table 2.12.3 Repeat mode specifications
Item
Specification
Function
The pin selected by the analog input pin select bit is used for repeated A-D conversion
Star 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
One of AN0 to AN7, as selected
Reading of result of A-D converter Read A-D register corresponding to selected pin
A-D control register 0 (Note 1)
b7 b6 b5 b4 b3 b2 b1 b0
01
Symbol
ADCON0
Address
03D616
When reset
00000XXX2
Bit symbol
Bit name
Function
RW
CH0
CH1
Analog input pin
select bit
CH2
b2 b1 b0
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
(Note 2)
MD0
MD1
A-D operation mode
select bit 0
b4 b3
0 1 : Repeat mode
(Note 2)
TRG
ADST
CKS0
Trigger select bit
A-D conversion start flag
Frequency select bit 0
0 : Software trigger
1 : ADTRG trigger
0 : A-D conversion disabled
1 : A-D conversion started
0 : fAD/4 is selected
1 : fAD/2 is selected
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 pin again.
A-D control register 1 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
1 00
Symbol
ADCON1
Address
03D716
When reset
0016
Bit symbol
Bit name
Function
RW
SCAN0 A-D sweep pin select bit Invalid in repeat mode
SCAN1
MD2
A-D operation mode
select bit 1
Reserved bit
0 : Any mode other than repeat sweep mode 1
Must always be set to "0".
CKS1
VCUT
Frequency select bit 1
Vref connect bit
0 : fAD/2 or fAD/4 is selected
1 : fAD is selected
1 : Vref connected
OPA0
OPA1
External op-amp
connection mode bit
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
Note: If the A-D control register is rewritten during A-D conversion, the conversion
result is indeterminate.
Figure 2.12.5 A-D conversion register in repeat mode
Rev. 1.0
137