Internal Block Diagram - Korg A4 Service Manual

AK5349
(ADC)
INTERNAL
BLOCK
DIAGRAM
I
CLK APD
NC
NO OCLK
CLK
SCLK
L/IY
FSYNC
(
23
) (
6
) (
8
) (
22
) (
21
) (
20
)
(
15
) (
14
) (
17
)
AK5349 (ADC)
PIN
FUNCTION
PIN NAME I/O
FUNCTION
AINL+
I
L
CHANNEL ANALOG SIGNAL INPUT (+)
AINL-
I
L
CHANNEL ANALOG SIGNAL
INPUT (-)
VREFIN
I
REFERENCE VOLTAGE INPUT
VA+
—
POWER SUPPLY FOR ANALOG CIRCUIT
(
+5V
)
AGND
—
GROUND FOR ANALOG CIRCUIT
APD
1
ANALOG POWER DOWN
(
"H*
LEVEL ACTIVE)
ACAL
I
ANALOG CALIBRATION
NC
I
NO
CONNECTION
DCAL 0
DIGITAL CALIBRATION
DPD
I
DIGITAL POWER DOWN
TST
I
TEST
CMODE
I
CLOCK MODE
"L":
CLK=256fs (12.288MHz fs=48KHz)
"H":
CLK=384fs (18.432MHz fs=48KHz)
SMODE
I
INTERFACE CLOCK I/O
SELECT
"L":
SLAVE MODE
(
L/R.
SCLK &
FSYNC*.
INPUT
)
"H":
MASTER MODE
(
L/R.
SCLK
& FSYNC: OUTPUT
)
L/R I/O
L/R CLOCK
SLAVE MODE: fs
CLOCK INPUT
MASTER MODE: fs
CLOCK OUTPUT
SCLK
I/O
SERIAL DATA CLOCK
SLAVE MODE: fs
CLOCK INPUT
MASTER
MODE: fs CLOCK
OUTPUT
SDATA 0
SERIAL
DATA OUTPUT
FSYNC I/O
FRAME SYNCHRONIZED CLOCK
SLAVE MODE:
CLOCK
INPUT
MASTER
MODE: CLOCK OUTPUT
VD+
—
POWER SUPPLY FOR DIGITAL CIRCUIT
(
+5V
)
DGND
—
GROUND FOR DIGITAL CIRCUIT
CLK
I
MASTER CLOCK INPUT
CMODE="H": 384fs
CMODE="L": 256fs
OCLK 0
128fs CLOCK OUTPUT
NC
—
NO
CONNECTION
I
CLK
I
128fs CLOCK INPUT
VL+
—
POWER SUPPLY FOR LOGIC CIRCUIT
(
+5V
)
LGND
—
GROUND FOR LOGIC CIRCUIT
VREF 0
REFERENCE VOLTAGE OUTPUT
2.56V
(
VA+ = +5V
)
AINR+
I
R
CHANNEL ANALOG SIGNAL
INPUT (-)
R
CHANNEL ANALOG SIGNAL INPUT (+>
19