Cypress CY3650, User Manual

Page: 15 / 15

– 10 – Ver 2.4
CY3650 USB Development System User’s Guide
6.3. J3 - RS232 Connector
J3 is a 9-pin male connector for RS-232 interface to a host PC. Connections are shown in Table 6. Pins not listed
are not connected
.
Table 5: J2 Connector Pin-out
Pin # Description Pin # Description
1 IA0 2 IA1
3 IA2 4 IA3
5 IA4 6 IA5
7 IA6 8 IA7
9 IA8 10 IA9
11 IA10 12 IA11
13 IA12 14 GND
15 IRAMS_ 16 IRAMR_
17 IRAMW_ 18 IOW_
19 IOR_ 20 SOI
21 - 22 BRQ
23 IRQ 24 IRA
25 BRA 26 TRQ
27 RESET 28 MASTER RESET
29 MR_ 30 MW_
31 GND 32 ID0
33 ID1 34 ID2
35 ID3 36 ID4
37 ID5 38 ID6
39 ID7 40 IROMS_
41 CLOCK 42 GND
43 DB7 44 DB6
45 DB5 46 DB4
47 DB3 48 DB2
49 DB1 50 DB0
51 DA7 52 DA6
53 DA5 54 DA4
55 DA3 56 DA2
57 DA1 58 DA0
59 VCC 60 GND
Table 6: J3 RS-232 Connector Pin-out
Pin Function
2 RXD - Output data to PC
3 TXD - Input data from PC
6 DSR - RUN_ signal to PC debug interface
7 RTS - input from PC (not used)