User Manual

Stereo Module

2015 Microchip Technology Inc.
Page 8
P
reliminary
Edition
BM23 pin diagram is shown in Figure 1-4. The pin descriptions are shown in Table 1-2
FIGURE 1-4: BM23 PIN DIAGRAM
TABLE 1‐2: BM23 PIN DESCRIPTION
Pin No.
Pin Type Name Description
1 I/O P0_0
IO pin, default pull-high input (Note 1)
UART TX_IND
2 I/O RFS0
I
2
S interface: DAC Left/Right Clock
3 I/O TFS0
I
2
S interface: ADC Left/Right Clock
4 I/O SLK0 I
2
S interface: Bit Clock
5 I DR0 I
2
S interface: DAC Digital Left/Right Data
6 O DT0 I
2
S interface: ADC Digital Left/Right Data
7 I/O P0_4 IO pin, default pull-high input
8 I EAN
Embedded ROM/External Flash enable
High: ROM mode;
Low: External Flash mode
9 I MIC1_P Mic 1 mono differential analog positive input
10 I MIC1_N Mic 1 mono differential analog negative input
11 P MIC_BIAS Power output, microphone biasing voltage
12 P VDDA
Power output, reserve for external cap to fine tune audio frequency
response, no need to add power to this pin
13 I AIR Stereo analog line in, R-channel
14 I AIL Stereo analog line in, L-channel