(4)

S: switch between FMIN and AMIN

0: FMIN

1: AMIN

122

Audio ICs

BU2616F

FInput data format

Explanation of the data

(1)

Example: S = 0, SW = 0

When divide ratio = 1000, the actual set value is 500 since it passes through 1 / 2 the circuit. This translates to 1F4 (H)

in HEX notation, and to (MSB) 0000 0001 1111 0100 (LSB) in binary notation. This data is used from LSB to D0 through

D15.

Example: S = 1, SW = 1

When divide ratio = 1000, the actual set value is 1000 since it does not pass through 1 / 2 the circuit. This translates to

3E8 (H) in HEX notation, and to (MSB) 0000 0011 1110 1000 (LSB) in binary notation. This data is used from LSB to

D0 through D15.

Example: S = 1, SW = 0

When divide ratio = 1000, D0 through D3 can be anything since it does not pass through the prescalar. This translates

to 3E8 (H) in HEX notation, and to (MSB) 0001 1111 0100 (LSB) in binary notation. This data is used from LSB to D0

through D15.

(2)

1: Nch open drain output ON

0: Nch open drain output OFF

(3)

(5)

CT: Intermediate frequency measurement opera-

tion

1: Begins measurement.

0: Resets internal counter, IFIN goes to pulldown.

(6)

L0, L1: Setting of IF frequency detection amplitude