Цитата(odessit @ 7 Фев. 2014, 17:21)
Имеет прямой выход для подключения низкоомных наушников. Питание выходного каскада 1,6в. Осюда можно сделать вывод, что напряжение на нем легко может быть до 300мВ. А не 13мВ. Подойдет 1:1. Делай.
" Headphone driver output 2*20mW@16ohm" - а вот нашел и прямое указание. Откуда получаем, Uвых=560мВ. Ну, я думаю, это максимум.
вот что нашел именно по этому чипу
Features
(+)Support WMA Decoder, bit rate 32~384Kbps, 8~48KHz
(+)On-chip Multi-use RAM ((22K+3*256)*8bit) and PCM RAM(8K*8bit) that can be switched to be MCU memory or DSP Memory
(+)Integrated MCU with DSU, the instruction set is compatible with Z80
(+)Internal ZRAM1 ((16K-64)*8bits), ZRAM2 ((6K+256)*8), ZRAM3 (14K*8) accessed by MCU
(+)Internal BROM build in Boot up and USB Upgrade firmware
(+)Internal SRAM access time<7ns, MROM access time<16ns
(+)External up to 4(pcs)x 32M~4G bytes Nand type Flash accessed by MCU or DMA
(+)Support SPI Nor Flash
(+)Support Smart Media Card
(+)Support following memory card interface
- Multi Media Card Specification Version 4.2 (1/4/8 bit mode)
- Secure Digital Card Specification Version 2.0(1/4-bit mode)
- Memory Stick Version 1.43(1/4-bit mode)
- Memory Stick Pro Version 1.02(1/4-bit mode)
- Memory Stick Pro-HG Version 1.01(1/4/8-bit mode)
(+)Support 24MHz OSC with on-chip PLL for MCU and about 32KHz RC oscillator
(+)2-channel DMA,1-channel CTC and interrupt controller for MCU
(+)Support USB 2.0 Compliance PHY+SIE
(+)Build in Stereo 16-bit Sigma-Delta D/A
(+)Enough GPIOs For all applications
(+)Support I2C/SPI/UART/IRC/SPDIF interface
(+)Support external 8080 Series LCM driver interface
(+)MCU run at 48MHz(typ),F/W can program from DC up to 48MHz transparently
(+)D/A+PA SNR :without A weight>91dB
(+)A/D SNR >90dB ,support Difference/2-channle Microphone
(+)Low Power Consumption:
<40mW@1.6V at typical audio decoder solution