No. 5602-9/14

LC72720, 72720M

8. RDS/RBDS (MMBS) selection (1 bit): RM

Initial value: RM = 0

Initial values: PT0 = 1, PT1 = 1, PT2 = 0 (mode 3)

Caution: 1. When PT2 is set to 1, the polarity of the T3 (RDCL), T6 (ERROR/57K), T7 (CORREC/ARI-ID) SYNC, and RDS-ID pins changes to active

high.

2. The output pins (T3 to T7, SYNC, and RDS-ID) are all open-drain pins, and require external pull-up resistors to output data.

These pins indicate the number of blocks in a set of 48 blocks that had errors before correction. The output polarity of these pins is fixed at the values

listed in the table.

RM

RBDS support

Decoding method

0

None

Only RDS data is decoded correctly (Offset word E is not detected.)

1

Provided

RDS and MMBS data is decoded correctly (Offset word E is also detected.)

9. Output pin settings (3 bits): PT0 to PT2

These bits control the T3, T4, T5, T6, T7, SYNC, and RDS-ID pins.

P

P

P

T3

T4

T5

T6

T7

Mode

T

T

T

0

1

2

RDCL

RDDA

RSFT

ERROR

57K

BE1

CORREC

ARI-ID

BE0

0

0

0

0

—

—

—

—

—

—

—

—

—

1

1

0

0

q

q

q

q

q

q

—

—

—

—

—

—

2

0

1

0

q

q

q

q

q

q

—

q

q

—

—

q

q

—

3

1

1

0

q

q

q

q

q

q

q

q

—

—

q

q

—

—

4

0

0

1

—

—

—

—

—

q

q

—

—

q

q

5

1

0

1

q

q

q

q

q

—

—

—

—

—

—

6

0

1

1

q

q

q

q

q

—

q

—

—

q

—

7

1

1

1

q

q

q

q

q

q

—

—

q

—

—

Pin T3 (RDCL)

PT2 = 0

Data (RDDA and RSFT) changes on this pin’s rising edge.

PT2 = 1

Data (RDDA and RSFT) changes on this pin’s falling edge.

Mode 2 (PT2 = 0)

Pin T7 (ARI-ID)

No SK

High (1)

SK present

Low (0)

Mode 3 (PT2 = 0)

Pin T6 (ERROR)

Pin T7 (CORREC)

Correction not possible

Low (0)

Low (0)

Errors corrected

High (1)

Low (0)

No errors

High (1)

High (1)

Mode 4

Pin T6 (BE1)

Pin T7 (BE0)

Number of error blocks (B)

B = 0

Low (0)

Low (0)

1

≤ B ≤ 20

Low (0)

High (1)

20 < B

≤ 40

High (1)

Low (0)

40 < B

≤ 48

High (1)

High (1)