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22 CY3270 PSoC® FirstTouch™ Guide, Document # 001-15945 Rev. **
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 3-4 is 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