Pinout

Pin ID	Pin Name	Toniebox usage	Target	Notes
01	LNA_IN
02	VDD3P3
03	VDD3P3
04	CHIP_PU
05	GPIO0	Boot		J100
06	GPIO1	SS	TRF7962A
07	GPIO2	MOSI	TRF7962A
08	GPIO3	MISO	TRF7962A
09	GPIO4	SCLK	TRF7962A
10	GPIO5	I2C_SDA	LIS + DAC
11	GPIO6	I2C_SCL	LIS + DAC
12	GPIO7	button pressed or charger present		wake up (1=no button/no charger)
13	GPIO8	ADC_charg	R75/R72, 100kΩ/100kΩ divider (div 2) U300 LM3485, 5V buck, charger
14	GPIO9	ADC_Vbatt	R57/R58, 100kΩ/33kΩ divider (div 4) right before U320 “BW93” boost?
–	–	–	–	–
15	GPIO10	DIN	DAC3100
16	GPIO11	BCLK	DAC3100
17	GPIO12	WCLK	DAC3100
18	GPIO13	IRQ	TRF7962A
19	GPIO14	IRQ	LIS3DH
20	VDD3P3_RTC
21	XTAL_32K_P
22	XTAL_32K_N
23	GPIO17	Blue-LED	LED
24	GPIO18	Green-LED	LED
25	GPIO19	Red-LED	LED
26	GPIO20	Ear left, big		active low
27	GPIO21	Ear right, small		active low
28	GPIO26 / SPICS1	RESET (active high)	DAC3100
–	–	–	–	–
29	VDD_SPI
30	SPIHD	RS	SPI flash	via 100Ω
31	SPIWP	WP	SPI flash	via 100Ω
32	SPICS0	SCS	SPI flash	via 22Ω
33	SPIHCLK	SCK	SPI flash	via 22Ω
34	SPIQ	SO	SPI flash	via 22Ω
35	SPID	SI	SPI flash	via 22Ω
36	GPIO48 / SPICLK_N	GPIO1	DAC3100
37	GPIO47 / SPICLK_P	Power	SD	Low = Power on
38	GPIO33	DAT2	SD
39	GPIO34	DAT3	SD
40	GPIO35	CLK	SD
41	GPIO36	DAT0	SD
42	GPIO37	DAT1	SD
–	–	–	–	–
43	GPIO38	CMD	SD	J102
44	MTCK	TCK	JTAG	J102
45	MTDO	TD0	JTAG	J102
46	VDD3P3_CPU
47	MTDI	TDI	JTAG	J102
48	MTMS	TMS	JTAG	J102
49	U0TXD	TX	UART	J103
50	U0RXD	RX	UART	J103
51	GPIO45	Power	LIS + DAC + Blue-LED	High = Power on
52	GPIO46			J101
53	XTAL_N
54	XTAL_P
55	VDDA
56	VDDA