4513 datasheet(153/210 Pages) RENESAS

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APPLICATION

2.5 A-D converter

2-50

4513/4514 Group User’s Manual

2.5.1 Related registers

(1)

A-D control register Q1

Analog input pin selection bits are assigned to register Q1.

Set the contents of this register through register A with the TQ1A instruction. The TAQ1 instruction

can be used to transfer the contents of register Q1 to register A.

Table 2.5.1 shows the A-D control register Q1.

Table 2.5.1 A-D control register Q1

A-D control register Q1

at reset : 00002

at power down : state retained

R/W

Not used

Analog input pin selection bits

(Note 2)

Q13

Q12

Q11

Q10

Notes 1: “R” represents read enabled, and “W” represents write enabled.

2: Select AIN4–AIN7 with register Q1 after setting register Q2.

(2)

A-D control register Q2

Analog input pin selection bits and A-D operation mode control bit are assigned to register Q2.

Set the contents of this register through register A with the TQ2A instruction. The TAQ2 instruction

can be used to transfer the contents of register Q2 to register A.

Table 2.5.2 shows the A-D control register Q2.

Table 2.5.2 A-D control register Q2

Q12

Q11

This bit has no function, but read/write is enabled.

Selected pin

AIN0

AIN1

AIN2

AIN3

AIN4 (Not available for 4513 Group)

AIN5 (Not available for 4513 Group)

AIN6 (Not available for 4513 Group)

AIN7 (Not available for 4513 Group)

Q10

A-D control register Q2

at reset : 00002

at power down : state retained

R/W

A-D operation mode control bit

P43/AIN7, P42/AIN6 pin function

selection bit (Note 3)

P41/AIN5 pin function selection bit

(Note 3)

P40/AIN4 pin function selection bit

(Note 3)

Q23

Q22

Q21

Q20

Notes 1: “R” represents read enabled, and “W” represents write enabled.

2: Select AIN4–AIN7 with register Q1 after setting register Q2.

3: In the 4513 Group, these bits are not used.

4: In the 4513 Group, only read/write of these bits is enabled.

A-D conversion mode

Comparator mode

P43, P42 (I/O) (Note 4)

AIN7, AIN6/P43, P42 (Output) (Note 4)

P41 (I/O) (Note 4)

AIN5/P41 (Output) (Note 4)

P40 (I/O) (Note 4)

AIN4/P40 (Output) (Note 4)

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