CCA2D2 v2 Pin Assignments

Microcontroller: PIC16F874-04/SO

Port A
A0 probe port A channel 0
A1 probe port A channel 1
A2 probe port B channel 0
A3 Vref+
A4 strobe LED to +5V bus
A5 probe port B channel 1

Port E
E0 Probe port A Vsw monitor
E1 Probe port B Vsw monitor
E2 Vbattery monitor

Port B
B0 IRDA Rx
B1 IRDA Tx
B2 24 bit converter (please tell me how you want to use this pin)
B3 24 bit converter (please tell me how you want to use this pin)
B4 24 bit converter (please tell me how you want to use this pin)
B5 Probe FRAM SCK
B6 Probe Port A FRAM SDA
B7 Probe Port B FRAM SDA

Port C
C0 Timer1 32.768 Khz Xtal
C1 Timer1 32.768 Khz Xtal
C2 CCP1 - unassigned
C3 Interface FRAM SCK
C4 Interface SRAM SDA
C5 Shift register latch
C6 RS232 Tx
C7 RS232 Rx

Port D
D0 Probe Port A Digital IO 0
D1 Probe Port A Digital IO 1
D2 Probe Port A Digital IO 2
D3 Probe Port B Digital IO 0
D4 Probe Port B Digital IO 1
D5 Probe Port B Digital IO 2
D6 Shift Register Data
D7 Shift Register Clock

Serial Shift Register

S0 Op Amp Enable

S1 VswA

S2 VswB

S3 SerPortEn