This page is a reference for all the connectors on the Topaz Development Kit.

Connector Summary

The table below summarizes the connectors and switches found on Topaz Development Board. The sections following this table give specific details for each connector.

Designator	Connector	Location
J1	Stereo audio output	Top
J2	RJ-45 Ethernet	Top
J4	DB9 RS23 Serial (UART1)	Top
J5	LCD Connector	Bottom
J7	SD Card	Bottom
J9	JTAG	Top
J10	USB OTG Mini-AB	Top
J11	USB Host –A	Top
J12	Power (Barrel connector)	Top
J13	Power (0.1" header)	Top
EXP1	Expansion header 1 (0.1")	Top
EXP2	Expansion header 2 (0.1")	Top
EXP3	Expansion header 3 (0.1")	Top
SW1	Configuration Switches	Top
RESET	Reset Button	Top
USER	User Button	Top
POWER	Power LED	Top
USER_LED	User LED	Top

Connector Details

Power (J10, J12 and J13)

The Topaz Development Kit can be powered by:

J10 - USB Mini-AB connector
J12 – 2.1mm Barrel connector (centre positive)
J13 – 0.1" pitch header (+5V and 0V).

Not that powering the board via USB may not be sufficient for large LCDs (greater than 4.3") or if you have devices attached to the expansion connectors or USB host port.
Note that J13 is not fitted to the board. This allows a polarized connector of your choice to be used.

RS232 Serial (J4)

This is a male DB9 connector. Signals are shown in the following table:

Pin	Signal
1	N/C
2	RXD
3	TXD
4	N/C
5	0V
6	N/C
7	RTS
8	CTS
9	N/C

RJ - 45 Ethernet

This is configured as a standard 100Mbps connection. Connect using standard Ethernet twisted-pair cabling. A crossover cable will be required if you are connecting directly to your PC.

SD Card (J7)

The SD card connector is connected to the SD1 controller of the i.MX25. It supports SD memory and SDIO cards. The signals are connected as show below.

Pin	Signal
1	DAT3
2	CMD
3	0V
4	+3.3V
5	CLK
6	0V
7	DAT0
8	DAT1
9	DAT2
Card Detect	GPIO 4-3
Write Protect	GPIO 4-2

LCD and Touch Screen Interface (J5)

The Topaz Development Board has a 50-pin connector that includes all the signals required to interface to a number of different displays.
Note: Some of these signals are 1.8V. Refer to the Topaz Reference Manual for details before interfacing to this connector.

Pin	Signal
1	+3.3V
2	+3.3V
3	VIN
4	VIN
5	CSPI1_MISO
6	CSPI1_MOSI
7	CSPI1_SS3
8	CSPI1_CLK
9	0V
10	LCD_LD0
11	LCD_LD1
12	LCD_LD2
13	LCD_LD3
14	LCD_LD4
15	LCD_LD5
16	LCD_LD6
17	LCD_LD7
18	LCD_LD8
19	LCD_LD9
20	LCD_LD10
21	LCD_LD11
22	LCD_LD12
23	LCD_LD13
24	LCD_LD14
25	LCD_LD15
26	0V
27	LCD_ACD_OE
28	LCD_VSYNC
29	LCD_HSYNC
30	LCD_LSCLK
31	0C
32	LCD_CONTRAST
33	GPIO 4-5
34	GPIO 4-6
35	GPIO 4-7
36	GPIO 4-8
37	GPIO 4-9
38	GPIO 4-10
39	GPIO 4-11
40	GPIO 4-12
41	I2C1_DAT
42	I2C1_CLK
43	0V
44	TOUCH_XN
45	TOUCH_XP
46	TOUCH_YN
47	TOUCH_YP
48	0V
49	VLED_FB
50	VLED

Configuration Switches (SW1)

There are 4 configuration switches on the Topaz Development Kit.
Switch these to the ON position (label side) to enable.

Switch	Label	Function
1	BOOT 0	When enabled, these switches put the board into boot-loader mode. Use the supplied software and cable to download new firmware to the board. For normal operation these must be in the disabled position.
2	BOOT 1
3	LION	LiIon signal to the Topaz Power Supply. Enable this signal if you are powering the development kit from a LiIon battery.
4	GP 1-04	Switch available for application use. When enabled the GPIO line is pulled low.

Expansion Headers (EXP1, EXP2 and EXP3)

The Topaz Development Board has 3 general purpose expansion headers. These expose signals from the Topaz module that are not used directly on the Development Board.
Each signal is labelled on the Development Board.
Note that some signals are 1.8V.

EXP1				EXP2
Pin	Signal	Pin	Signal	Pin	Signal	Pin	Signal
1	0V	2	0V	1	I2C1_CLK	2	PWM1
3	+3.3V	4	+3.3V	3	I2C1_DAT	4	PWM2
5	AudioLineIn-L	6	SPI1_MISO	5	ONE_WIRE	6	PWM3
7	AudioLineIn-R	8	SPI1_MOSI	7	CLKO	8	CAN_TXD
9	AudioLineOut-L	10	SPI1_RDY	9	0V	10	CAN_RXD
11	AudioLineOut-R	12	SPI1_CLK	11	ADC_REF	12	UART4_RXD
13	AudioMicIn	14	SPI1_SS0	13	ADC_AUX0	14	UART4_TXD
15	0V	16	SPI1_SS1	15	ADC_AUX1	16	UART4_CTS
17	0V	18	SPI1_SS3	17	ADC_AUX2	18	UART4_RTS
19	SIM1_CLK	20	SIM2_CLK	19	UART2_CTS	20	UART3_RXD
21	SIM1_RST	22	SIM2_RST	21	UART2_RTS	22	UART3_TXD
23	SIM1_VEN	24	SIM2_VEN	23	UART2_RXD	24	UART3_CTS
25	SIM1_TX	26	SIM2_TX	25	UART2_TXD	26	UART3_RTS
27	SIM1_PD	28	SIM2_PD	27	MODULE_RESET	28	+3.3V
29	SIM1_RX	30	SIM2_RX	29	VIN	30	VIN
31	GP 3-23	32	GP3-24	31	0V	32	0V
EXP3
Pin	Signal	Pin	Signal
1	0V	2	0V
3	+3.3V	4	+3.3V
5	MESH_C	6	GP 3-19
7	MESH_D	8	ON/OFF
9	DRYICE_VOUT	10	CSI_D2
11	TAMPER_A	12	CSI_D3
13	TAMPER_B	14	CSI_D4
15	FUSE_VDD	16	CSI_D5
17	CSI_MCLK	18	CSI_D6
19	CSI_PIXCLK	20	CSI_D7
21	GP 3-15	22	CSI_D8
23	GP 3-16	24	CSI_D9
25	GP 1-5	26	CSI_HSYNC
27	GP 2-20	28	CSI_VSYNC
29	DRYICE_VBAT	30	VIN
31	0V	32	0V

RESET (SW3)

The RESET button shorts MODULE_RESET to 0V causing a hard reset of the CPU.

JTAG (J9)

The Topaz Development Board includes a standard 20-pin JTAG connector. The i.MX25 supports RTCK and DE_B signals and they have been included on this connector, however they are not necessary to use JTAG.

Pin	Signal	Pin	Signal
1	+3.3V	2	Not connected
3	TRST	4	0V
5	TDI	6	0V
7	TMS	8	0V
9	TCK	10	0V
11	RTCK (ONE_WIRE)	12	0V
13	TDO	14	0V
15	MODULE_RESET	16	0V
17	DE_B (GP 2-20)	18	0V
19	Not connected	20	0V

Connectors and Signals