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Analog-to-Digital Converter
Block Diagram
Panasonic Semiconductor Development Company MN102H75K/F75K/85K/F85K LSI User Manual
144
Panasonic
6.3 Block Diagram
6.4 A/D Conversion Timing
6.4.1 Selecting the ADC Clock Source
Calculate the A/D conversion time as follows:
conversion time (s) = [12 (cycles) × (B
OSC
cycle) (s) × divide-by ratio] / ch
For example, if you set the clock source to B
OSC
/8, the conversion time is B
OSC
× 96 cycles.
Figure 6-2 ADC Block Diagram
Figure 6-3 ADC Timing
V
DD
V
SS
ANCTR
B
OSC
A/D interrupt request
AN11BUF-AN0BUF
ADIN0
ADIN1
ADIN2
ADIN3
ADIN4
ADIN5
ADIN6
ADIN7
ADIN8
ADIN9
ADIN10
ADIN11
M
U
X
Shift register for state information
Divider
INC
Interrupt
generated
Compare
Data registers
8-bit x 12
128 64 32 16 8 4 2 1 1
ANNCH AN1CH
Storage of converted data
State
Reference
Clock
S/H
bit 7S/H
bit 7 6 5 4
3
2 1 0
Transfer
- Interrupt
- Write to
register
12 cycles
In continuous mode