Cypress Semiconductor CY8C21234, Specification Sheet

Page: 14 / 45

CY8C21634, CY8C21534
CY8C21434, CY8C21334, CY8C21234
Document Number: 38-12025 Rev. *O Page 14 of 45
19 IO P3[3]
20 IO P3[1]
21 NC No connection.
22 NC No connection.
23 IO P1[7] I2C Serial Clock (SCL).
24 IO P1[5] I2C Serial Data (SDA).
25 NC No connection.
26 IO P1[3] I
FMTEST
.
27 IO P1[1] Crystal Input (XTALin), I2C Serial Clock (SCL), ISSP-SCLK
[3]
..
28 Power Vss Ground connection.
29 NC No connection.
30 NC No connection.
31 IO P1[0] Crystal Output (XTALout), I2C Serial Data (SDA), ISSP-SDATA
[3]
..
32 IO P1[2] V
FMTEST
.
33 IO P1[4] Optional External Clock Input (EXTCLK).
34 IO P1[6]
35 NC No connection.
36 NC No connection.
37 NC No connection.
38 NC No connection.
39 NC No connection.
40 NC No connection.
41 Input XRES Active high external reset with internal pull down.
42 OCD HCLK OCD high-speed clock output.
43 OCD CCLK OCD CPU clock output.
44 IO P3[0]
45 IO P3[2]
46 NC No connection.
47 NC No connection.
48 IO I P2[0]
49 IO I P2[2]
50 IO P2[4]
51 IO P2[6]
52 IO I P0[0] Analog column mux input.
53 IO I P0[2] Analog column mux input and column output.
54 IO I P0[4] Analog column mux input and column output.
55 IO I P0[6] Analog column mux input.
56 Power Vdd Supply voltage.
LEGEND : A = Analog, I = Input, O = Output, and OCD = On-Chip Debug.
Table 7. Pin Definitions - CY8C21001 56-Pin (SSOP) (continued)
Pin No.
Type
Pin Name Description
Digital Analog
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