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Cypress Semiconductor CY8C27x43 User Manual Page 12

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May 6, 2005 Document No. 38-12012 Rev. *J 12
CY8C27x43 Final Data Sheet 1. Pin Information
1.1.5 48-Pin Part Pinouts
Table 1-5. 48-Pin Part Pinout (SSOP)
Pin
No.
Type
Pin
Name
Description
CY8C27643 48-Pin PSoC Device
Digital Analog
1 IO I P0[7] Analog column mux input.
2 IO IO P0[5] Analog column mux input and column output.
3 IO IO P0[3] Analog column mux input and column output.
4 IO I P0[1] Analog column mux input.
5 IO P2[7]
6 IO P2[5]
7 IO I P2[3] Direct switched capacitor block input.
8 IO I P2[1] Direct switched capacitor block input.
9 IO P4[7]
10 IO P4[5]
11 IO P4[3]
12 IO P4[1]
13 Power SMP Switch Mode Pump (SMP) connection to
external components required.
14 IO P3[7]
15 IO P3[5]
16 IO P3[3]
17 IO P3[1]
18 IO P5[3]
19 IO P5[1]
20 IO P1[7] I2C Serial Clock (SCL).
21 IO P1[5] I2C Serial Data (SDA).
22 IO P1[3]
23 IO P1[1] Crystal Input (XTALin), I2C Serial Clock
(SCL), ISSP-SCLK.
24 Power Vss Ground connection.
25 IO P1[0] Crystal Output (XTALout), I2C Serial Data
(SDA), ISSP-SDATA.
26 IO P1[2]
27 IO P1[4] Optional External Clock Input (EXTCLK).
28 IO P1[6]
29 IO P5[0]
30 IO P5[2]
31 IO P3[0]
32 IO P3[2]
33 IO P3[4]
34 IO P3[6]
35 Input XRES Active high external reset with internal pull
down.
36 IO P4[0]
37 IO P4[2]
38 IO P4[4]
39 IO P4[6]
40 IO I P2[0] Direct switched capacitor block input.
41 IO I P2[2] Direct switched capacitor block input.
42 IO P2[4] External Analog Ground (AGND).
43 IO P2[6] External Voltage Reference (VRef).
44 IO I P0[0] Analog column mux input.
45 IO IO P0[2] Analog column mux input and column output.
46 IO IO P0[4] Analog column mux input and column output.
47 IO I P0[6] Analog column mux input.
48 Power Vdd Supply voltage.
LEGEND: A = Analog, I = Input, and O = Output.
SSOP
A, I, P0[7]
Vdd
A, IO, P0[5]
P0[6], A, I
A, IO, P0[3]
P0[4], A, IO
A, I, P0[1] P0[2], A, IO
P2[7]
P0[0], A, I
P2[5]
P2[6], External VRef
A, I, P2[3]
P2[4], External AGND
A, I, P2[1]
P2[2], A, I
P4[7] P2[0], A, I
P4[5]
P4[6]
P4[3]
P4[4]
P4[1]
P4[2]
SMP
P4[0]
P3[7]
XR ES
P3[5]
P3[6]
P3[3] P3[4]
P3[1]
P3[2]
P5[3]
P3[0]
P5[1]
P5[2]
I2C SCL, P1[7]
P5[0]
I2C SDA, P1[5]
P1[6]
P1[3]
P1[4], EXTCLK
I2C SCL, XTALin, P1[1]
P1[2]
Vss
P1[0], XTALout, I2C SDA
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