CY550 Pinout

CY550 DIP Pinout
CY550/J PLCC Pinout
CY550/Q QFP Pinout*

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CY550 Dip Pin#	CY550/J PLCC Pin#	CY550/Q QFP* Pin#	Pin Name	I/O	Description
-	1	39	NC		no internal connection
1	2	40	Pulse/	O	Step pulse output
2	3	41	CCW	I/O	Step direction
3	4	42	Stopped	O	Motion status, Lo=stepping
4	5	43	CW Limit/	I	Clockwise step limit reached
5	6	44	CCW Limit/	I	Counter Clockwise step limit reached
6	7	1	Jog	I/O	Manual stepping control
7	8	2	Slew/	I/O	Slew indicator signal
8	9	3	Inhibit_Abort/	I	External motion control
9	10	4	Reset	I	CY550 hardware reset when high
10	11	5	RxD	I	Received Serial Data line
-	12	6	NC		no internal connection
11	13	7	TxD	O	Transmitted Serial Data Line
12	14	8	CTS/	O	Serial Clear-to-send, CY550 is ready when low
13	15	9	IO Request/	I	Parallel handshake input; else Serial baud select: Lo=300, Hi=2400, Z=9600
14	16	10	Xmem Sel/	I/O	External local memory select
15	17	11	Busy/	I/O	Parallel handshake acknowledgement
16	18	12	WR/	O	Parallel Write Strobe
17	19	13	RD/	O	Parallel Read Strobe
18	20	14	Xtal2	I	Crystal oscillator connection
19	21	15	Xtal1	I	Crystal oscillator connection
20	22	16	Vss	I	Ground connection for CY550
-	23	17	NC		no internal connection
21	24	18	UserBit0	I/O	User selectable function, bit 0
22	25	19	UserBit1	I/O	User selectable function, bit 1
23	26	20	UserBit2	I/O	User selectable function, bit 2
24	27	21	UserBit3	I/O	User selectable function, bit 3
25	28	22	UserBit4	I/O	User selectable function, bit 4
26	29	23	UserBit5	I/O	User selectable function, bit 5
27	30	24	UserBit6 or FPL/ or DTR/	I/O	User selectable function, bit 6 or FPL/ or DTR/
28	31	25	UserBit7 or HP_Sel/	I/O	User selectable function, bit 7 or HP_Sel/
29	32	26	Reserved	O	do not connect
30	33	27	ALE	O	Address Latch enable
-	34	28	NC		no internal connection
31	35	29	Test	I	+5v
32	36	30	D 7	I/O	Parallel Data Bus bit 7 (MSB)
33	37	31	D 6	I/O	Parallel Data Bus bit 6
34	38	32	D 5	I/O	Parallel Data Bus bit 5
35	39	33	D 4	I/O	Parallel Data Bus bit 4
36	40	34	D 3	I/O	Parallel Data Bus bit 3
37	41	35	D 2	I/O	Parallel Data Bus bit 2
38	42	36	D 1	I/O	Parallel Data Bus bit 1
39	43	37	D 0	I/O	Parallel Data Bus bit 0 (LSB)
40	44	38	Vcc (+ 5V)	I	+5 volt power supply

* QFP Notes:
- While the numbering scheme of the QFP pinout differs from the PLCC, the physical location of functional pins will be identical on both packages.
- The QFP package is currently only available in 1000 quantity minimums.