PI2Media 502HTA
Hardware Reference Manual – P3 - 8/31/2017
PAGE 6
502HTA BLOCK DIAGRAM
PCM5102A 24-Bit
192Khz DAC
ULTRA-LOW
NOISE LDO’S
ANALOG RIGHT
I2S INPUT
USB-A
HOST
USB-A
HOST
USB-A
HOST
USB-A
HOST
10/100 RJ45
w/Transformer
HDMI
4
0
-P
in
E
x
p
a
n
si
o
n
H
e
a
d
e
r
ANALOG LEFT
LOW JITTER PLL
Raspb erry Pi ®
w/40-PIN GPIO Header
HW CONTROL
½ DUAL
TRIODE
IRL510/
LM317A
IRL510/
LM317A
WIDE INPUT
6.3V SWITCHING
SUPPLY
24V @ 2A
Power Brick
Backpower
Protection
Circuit
5V @ 3A
LDO
4
0
-P
in
S
o
c
k
e
t
+5V
GPIO
I2S
OUTPUT
RESISTOR
SELECT
OUTPUT
RESISTOR
SELECT
SERIES/
PARALLEL
HEATER SEL
3.5MM
Headphone
Jack
3.5MM
Stereo
Input Jack
ANODE/
CATHODE
BIAS ADJ
½ DUAL
TRIODE
GAIN SWITCH
& VOL UME
CONTROL
Volume Control
On/Off Switch
Figure 1 – 502HTA Block Diagram
