8x2 0.100 Female Expansion Receptacle

Technical Reference

Noticed that the CY8C24894 PSoC device is the only active component in the entire circuit. This sin- gle PSoC handles all communications between the applications, USB, and expansion card inter- faces.

The FirstTouch expansion card connects to the FTPC bridge through the 8x2 Expansion Port (this is a built-in port on the bridge). If you are using only the FirstTouch expansion card, it is generally not necessary to understand everything about this expansion port or the signals that it contains. By attaching an expansion card, all of the necessary connections are made.

Figure 3-2is the pinout diagram for the FTPC Expansion Port. Refer to this figure as you create projects. As you get more accustomed to the FirstTouch Kit and design flow, you may find yourself wanting to make your own expansion cards. At that time, you may want to review the interface sig- nals.

Figure 3-2. FTPC Expansion Port Pinout Diagram

V50

A+ C1

22 uFd 10v

8x2 0.100" FEMALE Expansion Receptacle

ISSP_XRES

ISSP_CLK

ISSP_DAT

TYPE

SPI_MISO

SPI_nSS

0805

100K

	J3
1
	VEXP_IN	VLOCAL
3
	GND	VEXP_OUT
5
	ISSP_XRES	SDA-MOSI
7
	ISSP_CLK	SCL-SCLK
9
	ISSP_DAT	GPIO5
11
	EXP_TYPE	GPIO4
13
	MISO	GPIO3
15
	SPI_nss	GPIO2

8X2 PIN RECPT RA

0805

DETECT

SDA_MOSI

SCL_SCLK

GPIO5

GPIO4

GPIO3

GPIO2