Renesas RA6 Series, Engineering Manual

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Renesas VUI Reference Solution VOICE-RA6E1 Engineering Manual
VOICE-RA6E1 Engineering Manual Rev.1.0 Page 10 of 14
June 2022
8.3 Microphones
This board includes a pair of analog MEMS microphones (M2 & M3, ZillTek ZTS6053). These 2 analog
microphone signals are amplified by Renesas READ2302GSP OPAMP, then fed to RA6E1 ADC channels 0
& 1. A pair of digital I2S MEMS microphone (M1 & M4, ZillTek ZTS6672) is also provided, which is
connected to RA6E1 SPI0 & SPI1 channels separately. The physical distance between each 2 microphones
is 50mm to support beamforming applications.
Table 6. Analog MEMS Microphone left channel (M2) Port Assignments
MCU Port MEMS microphone Pin
P000 1
– OUT
2
– GND
3
– GND
4
– GND
5
– VDD
Table 7. Analog MEMS Microphone right channel (M3) Port Assignments
MCU Port MEMS microphone Pin
P001 1
– OUT
2
– GND
3
– GND
4
– GND
5
– VDD
Table 8. Digital I2S MEMS Microphone left channel (M1) Port Assignments
MCU Port SPI0 Signal MEMS microphone Pin
P205 SSLA0 1
– LRC (Word Select)
GND
– for Select as left channel
2
– SELECT
GND 3
– GND
P111 RSPCK0 4
– BCLK
3.3V 5
– VDD
P109 MOSI0 6
– DATA
7
– CONFIG
Table 9. Digital I2S MEMS Microphone right channel (M4) Port Assignments
MCU Port SPI1 Signal MEMS microphone Pin
P103 SSLB0 1
– LRC (Word Select)
VDD
– for Select as right channel
2
– SELECT
GND 3
– GND
P102 RSPCK1 4
– BCLK
3.3V 5
– VDD
P101 MOSI1 6
– DATA
7
– CONFIG
The Digital I2S MEMS Microphone right channel is multiplexed with QSPI Flash. To use the Digital
Microphone, please short pins 2-3 on J12~J14.
8.4 Audio out
A stereo headphone jack is connected to the MCU DAC. The DAC signals are connected through an
OPAMP. The device is Renesas READ2302GSP, in ultra-small 8 pins TSSOP packages.
Table 10. Headphone Jack Pin Assignments
MCU Port Audio out Signal Headphone Jack Pin
P014 (DA0) VOUT1 1 (Sleeve)
VOUT2 2 (Mono signal)
VOUT2 3 (Mono signal)