Renesas 4514 User Manual

4513/4514 Group User’s Manual

1-41

The 4513/4514 Group has a built-in A-D conversion circuit that

performs conversion by 10-bit successive comparison method.

Table 14 shows the characteristics of this A-D conver ter. This A-

D converter can also be used as an 8-bit comparator to compare

analog voltages input from the analog input pin with preset val-

ues.

Characteristics

Successive comparison method

10 bits

Linearity error: ±2LSB

Non-linearity error: ±0.9LSB

46.5 

µ

s (High-speed mode at 4.0 MHz

oscillation frequency)

4 for 4513 Group

8 for 4514 Group

Parameter

Conversion format

Resolution

Relative accuracy

Conversion speed

Analog input pin

Register A (4)

V

SS

     V

DD

 

    IAP4
(P4

0

—

P4

3

)

TABAD

1/6

Q2

3

Register B (4)

Q1

1

Q1

0

Q1

2

TADAB

Q2

2

Q2

1

Q2

0

0

1

4

4

4

4

8

8

8

0

1

1

8

10

Q2

3

Q2

3

DAC
operation 
signal

0

1

Q2

3

8

8

2

TALA

Q2

3

Q1

3

TAQ1
TQ1A

TAQ2
TQ2A

 ADF

(1)

A

IN0

/CMP0-

A

IN1

/CMP0+

A

IN2

/CMP1-

A

IN3

/CMP1+

P4

0

/A

IN4

P4

1

/A

IN5

P4

2

/A

IN6

P4

3

/A

IN7

3

1

0

10

Comparator

8-channel multi-plexed analog switch

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 (Q2

3

=1).

The value of the comparator register is retained even when the mode is switched to the A-D conversion 
mode (Q2

3

=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 P4

0

/A

IN4

–P4

3

/A

IN7

 and the IAP4 and OP4A instructions.

(Note 3)

    OP4A
(P4

0

—

P4

3

)