AK4145 Datasheet, PDF (3/27 Pages) Asahi Kasei Microsystems – Digital BTSC Stereo Encoder

[AK4145]
PIN/FUNCTION
No. Pin Name I/O Function
1 FILT
-
Filter Pin, 4.7nF must be connected between FILT pin and VSS pin.
2 PSN
I
Parallel/Serial Select Pin
“L”: Serial control mode, “H”: Parallel control mode
3 CV27M I
Composite Video or 27MHz Signal Input Pin.
4 PDN
I
Power-Down Mode Pin
When at “L”, the AK4145 is in the power-down mode and is held in reset.
The AK4145 must be reset once upon power-up.
5 MCLK
I
Master Clock Input Pin
6 LRCK
I
Channel Clock Input Pin
7 BICK
I
Audio Serial Data Clock Input Pin
8 SDTI
I
Audio Serial Data Input Pin
9 FS
I
Sampling Rate Control Pin in parallel control mode
SDA
I/O Control Data Pin in serial control mode
10 DIF
I
Audio Data Interface Format Pin in parallel control mode
SCL
I
Control Data Clock Pin in serial control mode
11 TVDD
-
Digital I/O Power Supply Pin, DVDD(min:1.7V) ∼ 3.6V
12 DVDD
-
Digital Power Supply Pin, 1.7 ∼ 1.9V
13 VSS
-
Ground Pin
14 VCOM
O Common Voltage Pin, AVDD/2
Normally connected to VSS with a 0.1μF ceramic capacitor in parallel with a 10μF
electrolytic cap.
15 AVDD
-
Analog Power Supply Pin, 2.7 ∼ 3.6V
16 CA
O Baseband Composite Audio Output Pin
Note: All input pins should not be left floating.
■ Handling of Unused Pin
The unused I/O pins should be processed appropriately as below.
Classification Pin Name
Analog
CV
Digital
FS(Parallel mode), DIF(Parallel mode)
Setting
Connect to VSS.
Connect to VDD or VSS.
■ Output Status at PDN pin = “L”
Below is the output status of each output pin when the PDN pin = “L”.
Pin#
Pin Name
1
FILT
9
SDA
14
VCOM
16
CA
Status
VSS
Hi-Z
VSS
VCOM(=VSS)
MS0982-E-01
-3-
2010/09