Cypress CY3270 manual Pin Number Port Number Design Function

Technical Reference

Since the FTMF Expansion Card connects the various sensors and output devices to predefined IO of the host CY8C21434, it is important that you follow the pin assignment shown in Figure 3-4 on page 21 and Table 3-1.

The schematic for the FTMF Expansion Card shown in Figure 3-4is found on the CD included in the kit.

Table 3-1. FTMF PSoC Pin Assignments

Pin Number	Port Number	Design Function
1	P0[1]	CapSense modulator capacitor
2	P2[7]	CapSense slider element 7
3	P2[5]	CapSense slider element 5
4	P2[3]	CapSense slider element 3
5	P2[1]	CapSense slider element 1
6	P3[3]	Unused / no-connect
7	P3[1]	CapSense feedback resistor
8	P1[7]	I2C clock line (SCL)
9	P1[5]	I2C data line (SDA)
10	P1[3]	Red LED drive
11	P1[1]	In system programming clock (ISSP_SCLK)
12	GND
13	P1[0]	In system programming data (ISSP_DAT)
14	P1[2]	Blue LED drive
15	P1[4]	Green LED drive
16	P1[6]	Alarm/buzzer FET drive
17	XRES	In system programming reset pin (ISSP_XRES)
18	P3[0]	Unused / no-connect
19	P3[2]	Unused / no-connect
20	P2[0]	CapSense proximity antenna pad (PRX1)
21	P2[2]	CapSense slider element 2
22	P2[4]	CapSense slider element 4
23	P2[6]	CapSense slider element 6
24	P0[0]	Thermistor temperature sensor analog input
25	P0[2]	User A/D-GPIO
26	P0[4]	User A/D-GPIO
27	P0[6]	Ambient light detector analog input
28	+Vdd
29	P0[7]	Thermistor drive-voltage reference analog input
30	P0[5]	User A/D-GPIO
31	P0[3]	User A/D-GPIO
32	GND

22 CY3270 PSoC® FirstTouch™ Guide, Document # 001-15945 Rev. **