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4513 Datasheet(PDF) 152 Page - Renesas Technology Corp

Part # 4513
Description  4-BIT SINGLE-CHIP MICROCOMPUTER
PDF  210 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

4513 Datasheet(HTML) 152 Page - Renesas Technology Corp

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APPLICATION
2.5 A-D converter
2-49
4513/4514 Group User’s Manual
2.5 A-D converter
The 4513/4514 Group has an A-D converter with the 10-bit successive comparison method: 4 channels for
the 4513 Group, 8 channels for the 4514 Group.
This A-D converter can also be used as a comparator to compare analog voltages input from the analog
input pin with preset values.
This section describes the related registers, application examples using the A-D converter and notes.
Figure 2.5.1 shows the A-D converter block diagram.
Fig. 2.5.1 A-D converter structure
Register A (4)
VSS
VDD
IAP4
(P40—P43)
TABAD
1/6
Q23
Register B (4)
Q11 Q10
Q12
TADAB
Q22 Q21 Q20
0
1
4
4
4
4
8
8
8
01
1
8
10
Q23
Q23
DAC
operation
signal
0
1
Q23
8
8
2
TALA
Q23
Q13
TAQ1
TQ1A
TAQ2
TQ2A
ADF
(1)
AIN0/CMP0-
AIN1/CMP0+
AIN2/CMP1-
AIN3/CMP1+
P40/AIN4
P41/AIN5
P42/AIN6
P43/AIN7
3
1
0
10
Comparator
Instruction clock
A-D control circuit
Successive comparison
register (AD) (10)
A-D interrupt
DA converter
(Note 1)
Comparator register (8)
(Note 2)
Notes 1: This switch is turned ON only when A-D converter is operating and generates the comparison voltage.
2: Writing/reading data to the comparator register is possible only in the comparator mode (Q23=1).
The value of the comparator register is retained even when the mode is switched to the A-D conversion
mode (Q23=0) because it is separated from the successive comparison register (AD). Also, the resolution in
the comparator mode is 8 bits because the comparator register consists of 8 bits.
3: The 4513 Group does not have ports P40/AIN4–P43/AIN7 and the IAP4 and OP4A instructions.
(Note 3)
OP4A
(P40—P43)



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