M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 426

• Manufacturer Part Number: M30622MA-XXXFP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY
• Manufacturer: RENESAS [Renesas Technology Corp]

A-D Converter
Figure 2.7.28. Internal equivalent circuit to analog input
2.7.14 Internal Equivalent Circuit of Analog Input
Figure 2.7.28 shows the internal equivalent circuit of analog input.
Parasitic
diode
AN0
Parasitic
diode
Control signal
for SW3
Control signal
for SW2
V
AVss
Vss
REF
AN i
Vcc
A-D control register 0
Warning: Use only as a standard for designing this data.
ON resistor
approx. 2k
Vcc Vss
b2 b1 b0
SW1
SW1
Connect to
Connect to
Comparison reference voltage (Vref) generator
(i = 10)
switches
i ladder-type
Sampling
Mass production may cause some changes in device characteristics.
Ω
Resistor
Wiring resistor
approx. 0.2k
ladder
Connect to
Connect to
Comparison
i ladder-type wiring
resistors
(i = 10)
Ω
Reference control
ON resistor
approx. 0.6k
ON resistor
approx. 0.6k
control signal
signal
SW2
Sampling
SW2
SW1 conducts only on the ports selected for analog input.
SW2 and SW3 are open when A-D conversion is not in
progress; their status varies as shown by the waveforms in
the diagrams on the left.
SW4 conducts only when A-D conversion is not in progress.
Analog input voltage
V
Ω
Comparison voltage
Ω
Vref
IN
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
C = Approx. 3.0pF
SW4
AVss
A-D successive conversion
AVcc
ON resistor,
approx. 5k
SW3
register
AMP
Chopper-type
amplifier
ADT/A-D conversion
Ω
Mitsubishi microcomputers
M16C / 62 Group
interrupt request
411