Cypress Semiconductor CY8C21234 Manual do Utilizador Página 14

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CY8C21634/CY8C21534
CY8C21434/CY8C21334/CY8C21234
Document Number: 38-12025 Rev. *Q Page 14 of 45
19 I/O P3[3]
20 I/O P3[1]
21 NC No connection.
22 NC No connection.
23 I/O P1[7] I2C Serial Clock (SCL).
24 I/O P1[5] I2C Serial Data (SDA).
25 NC No connection.
26 I/O P1[3] I
FMTEST
.
27 I/O 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 I/O P1[0] Crystal Output (XTALout), I2C Serial Data (SDA), ISSP-SDATA
[3]
..
32 I/O P1[2] V
FMTEST
.
33 I/O P1[4] Optional External Clock Input (EXTCLK).
34 I/O 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 I/O P3[0]
45 I/O P3[2]
46 NC No connection.
47 NC No connection.
48 I/O I P2[0]
49 I/O I P2[2]
50 I/O P2[4]
51 I/O P2[6]
52 I/O I P0[0] Analog column mux input.
53 I/O I P0[2] Analog column mux input and column output.
54 I/O I P0[4] Analog column mux input and column output.
55 I/O 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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