miniDSP Ltd, Hong Kong /
/ Features and specifications subject to change without prior notice
12
2.4
J1
EXPANSION HEADER
The user-accessible pins in the J1 header are listed in Table 2 below. Only a small number of pins are intended to
be user-accessible. Please do not connect to any pins marked “—”.
Table 2. J1 expansion header pinout
Pin Function
Pin Function
1
—
2
—
3
GND
4
GND
5
GND
6
GND
7
—
8
I2S input slave select (pull low)
9
I2S output slave select (pull low)
10 —
11 —
12 —
13 —
14 —
15 —
16 —
17 —
18 —
19 —
20 —
21 —
22 —
23 —
24 —
25 —
26 —
27 —
28 —
29 —
30 —
2.5
J2
EXPANSION HEADER
The user-accessible pins in the J2 header are listed in Table 3 below. This header contains all of the I2S input and
output signals.
Table 3. J2 expansion header pinout
Pin Function
Pin Function
1
SPDIF RX (3.3V compliant)
2
SPDIF TX (3.3V compliant)
3
LRCLK_SPDIF (Not used in current firmware)
4
BCLK_SPDIF (Not used in current firmware)
5
GND
6
GND
7
GND
8
GND
9
MCLK
10 I2S_DATA_IN1&2
11 I2S_DATA_IN3&4
12 I2S_DATA_IN5&6
13 I2S_DATA_IN7&8
14 I2S_IN_LRCLK
15 I2S_IN_BCLK
16 I2S_DATA_OUT1&2
17 I2S_DATA_OUT3&4
18 I2S_DATA_OUT5&6
19 I2S_DATA_OUT7&8
20 I2S_OUT_LRCLK
21 I2S_OUT_BCLK
22 3.3V
23 GND
24 3.3V
25 GND
26 GND
27 NC
28 NC
29 NC
30 NC