CY327 Pinouts

CY327 DIP Pinout
CY327/J PLCC Pinout
CY327/Q QFP Pinout*

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CY327 Dip Pin#	CY327/J PLCC Pin#	CY327/Q QFP* Pin#	Pin Name	I/O	Description
-	1	39	NC		no internal connection
1	2	40	Key 1	I/O	Soft Key or Matrix
2	3	41	Key 2	I/O	Soft Key or Matrix
3	4	42	Key 3	I/O	Soft Key or Matrix
4	5	43	Key 4	I/O	Soft Key or Matrix
5	6	44	Key 5	I/O	Soft Key or Matrix
6	7	1	Key 6	I/O	Soft Key or Matrix
7	8	2	Key 7	I/O	ASCII or 4x4 Matrix
8	9	3	Key Sent/	O	SoftKey status, ASCII, or 4x4 Matrix
9	10	4	Reset	I	Resets CY327 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	Write 327/	I	Write parallel data strobe to CY327
13	15	9	Scan Keys/	I	Enable Key scan on Pins 1-6
14	16	10	Nx64	I	Select LCD height. Hi=64, Lo=128
15	17	11	CTS/	O	Clear-to-send serial data when low
16	18	12	Enable LCD	O	Enable strobe to LCD
17	19	13	R-W LCD	O	Read-Write Signal to LCD
18	20	14	Xtal2	I	Crystal oscillator connection
19	21	15	Xtal1	I	Crystal oscillator connection
20	22	16	Vss	I	Ground connection for CY327
-	23	17	NC		no internal connection
21	24	18	Baud Rate	I	Lo=2400, Hi=9600, Z=adaptive
22	25	19	Font Size	I	Lo=8x8, Hi=6x8 character font
23	26	20	Bus Write/	O	CY327 wants to write data to bus
24	27	21	Ready	O	CY327 ready to accept data
25	28	22	Bus Ctrl/	O	Enables data onto CY327/LCD data bus
26	29	23	LCD select/	O	chip-selects HD61830 for data transfer
27	30	24	LCD reg	O	HD61830 register: Hi=Reg, Lo=Data
28	31	25	LCD reset	O	Drives HD61830 reset line
29	32	26	Reserved	O	do not connect
30	33	27	Clock Out	O	clock output, 1/6 crystal rate
-	34	28	NC		no internal connection
31	35	27	Vdd	I	+5v
32	36	30	D 7	I/O	Data Bus bit 7 (MSB)
33	37	31	D 6	I/O	Data Bus bit 6
34	38	32	D 5	I/O	Data Bus bit 5
35	39	33	D 4	I/O	Data Bus bit 4
36	40	34	D 3	I/O	Data Bus bit 3
37	41	35	D 2	I/O	Data Bus bit 2
38	42	36	D 1	I/O	Data Bus bit 1
39	43	37	D 0	I/O	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.