Interface And Connections - Texas Instruments DEM-PCM2912AEVM User Manual

Hardware
TQFP-36
Name Terminal
POWER 24
PGND 25
V 26
CCP
TEST1 27
TEST0 28
SSPND 29
MMUTE 30
REC 31
PLAY 32

2.2 Interface and Connections

Table 2-2 lists the connector references for the DEM-PCM2912A EVM.
Connectors
(1) The status of SW1 (microphone mute switch) is not reflected in the Mic Mute status of the Wave In
display on a Windows-based PC; the operating system does not support an HID function.
4 DEM-PCM2912A Evaluation Module
Table 2-1. PCM2912A Terminal Functions (continued)
I/O
I Power consumption declaration select pin (LOW: 100 mA; HIGH: 500 mA)
– Analog ground for microphone bias, microphone amplifier, and PGA
– Analog power supply for PLL
I Test pin. Must be set to high.
I Test pin. Must be set to low.
O Suspend flag (LOW: Suspend; HIGH: Operational state)
I Microphone mute control, active high (LOW: Mute off; HIGH: Mute on)
O Status output for record (LOW: Record; FLASH: Mute on record; HIGH: Stop)
O Status output for playback (LOW: Playback; FLASH: Mute on playback; HIGH: Stop)
Table 2-2. DEM-PCM2912A EVM Connectors
CN1 USB connector, type A
J1 Mono microphone input
J2 Headphone output terminal
D1 LED (red); record indicator (flash while muting)
D2 LED (green); playback indicator (flash while muting)
S1-1 Microphone mute switch (ON: Mute; OFF: Unmute)
S1-2 Power select (ON: 100 mA; OFF: 500 mA)
Microphone amplifier gain control
S1-3
(ON: 0 dB; OFF: +20dB)
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Description
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SBAU141A – JANUARY 2009 – REVISED APRIL 2024
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