Lucent Technologies MN102H75K User Manual
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
VDD
VSS
VSS
ANCTR
BOSC
A/D interrupt request
AN11BUF-AN0BUF
ADIN0
ADIN1
ADIN2
ADIN3
ADIN4
ADIN5
ADIN6
ADIN7
ADIN8
ADIN9
ADIN1
ADIN2
ADIN3
ADIN4
ADIN5
ADIN6
ADIN7
ADIN8
ADIN9
ADIN10
ADIN11
ADIN11
M
U
X
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 7
S/H
bit 7
6
5
4
3
2
1
0
Transfer
- Interrupt
- Write to
register
- Write to
register
12 cycles
In continuous mode