M306V0ME-107FP MITSUBISHI [Mitsubishi Electric Semiconductor], M306V0ME-107FP Datasheet - Page 133

• Manufacturer Part Number: M306V0ME-107FP
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

Rev. 1.0
2.12 A-D Converter
Table 2.12.1 Performance of A-D converter
Notes 1: Does not depend on use of sample and hold function.
The A-D converter consists of one 8-bit successive approximation A-D converter circuit with a capacitive coupling
amplifier. Pins P10
D conversion must therefore be set to input. The Vref connect bit (bit 5 at address 03D7
resistance ladder of the A-D converter from the reference voltage (V
so stops any current flowing into the resistance ladder from V
D converter, start A-D conversion only after setting bit 5 of 03D7
The result of A-D conversion is stored in the A-D registers of the selected pins.
Table 2.12.1 shows the performance of the A-D converter. Figure 2.12.1 shows the block diagram of the A-
D converter, and Figures 2.12.2 to 2.12.5 show the A-D converter-related registers.
Method of A-D conversion Successive approximation (capacitive coupling amplifier)
Analog input voltage (Note 1) 0V to AV
Operating clock AD (Note 2) f
Resolution
Absolute precision
Operating modes
Analog input pins
A-D conversion start condition • Software trigger
Conversion speed per pin • Without sample and hold function
2: Divide the frequency if f(X
sample and hold function, set the
With the sample and hold function, set the
Item
2
to P10
7
also function as the analog signal input pins. The direction registers of these pins for A-
8-bit
V
One-shot mode, repeat mode, single sweep mode, repeat sweep mode 0,
and repeat sweep mode 1
6 pins (AN
• With sample and hold function
AD
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
A-D conversion starts when the A-D conversion start flag changes to “1”
49
28
CC
/divide-by-2 of f
= 5V
AD
AD
IN
) exceeds 10 MHz, and make
cycles
cycles
CC
0
(V
to AN
• Without sample and hold function: 5 LSB
• With sample and hold function: 5 LSB
CC
AD
)
5
AD
)
frequency to 250kHz min.
/divide-by-4 of f
AD
REF
frequency to 1MHz min.
, reducing the power dissipation. When using the A-
16
Performance
REF
to connect V
AD
) when the A-D converter is not used. Doing
AD
, f
and ON-SCREEN DISPLAY CONTROLLER
AD
frequency equal to 10 MHz. Without
=f(X
MITSUBISHI MICROCOMPUTERS
REF
IN
M306V0ME-XXXFP
.
)
16
) can be used to isolate the
M306V0EEFP
133