CY8C27143, CY8C27243
CY8C27443, CY8C27543, CY8C27643
44-Pin Part Pinout
Table 6. Pin Definitions - 44-Pin TQFP
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
Type
Digital
IO
IO
IO
IO
IO
IO
IO
Analog
I
I
Pin Name
P2[5]
P2[3]
P2[1]
P4[7]
P4[5]
P4[3]
P4[1]
SMP
P3[7]
P3[5]
P3[3]
P3[1]
P1[7]
P1[5]
P1[3]
P1[1]
Description
Direct switched capacitor block input.
Direct switched capacitor block input.
Figure 6. CY8C27543 44-Pin PSoC Device
P0[6], A, I
P0[4], A, IO
P0[2], A, IO
P0[0], A, I
P2[6],ExternalVRef
33
32
31
30
29
28
27
26
25
24
23
P2[4], External AGND
P2[2], A, I
P2[0], A, I
P4[6]
P4[4]
P4[2]
P4[0]
XRES
P3[6]
P3[4]
P3[2]
Power
IO
IO
IO
IO
IO
IO
IO
IO
Power
IO
IO
IO
IO
IO
IO
IO
IO
Input
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
Power
IO
IO
IO
IO
IO
I
IO
IO
I
Switch Mode Pump (SMP) connection to external
components required.
Vss
P1[0]
P1[2]
P1[4]
P1[6]
P3[0]
P3[2]
P3[4]
P3[6]
XRES
P4[0]
P4[2]
P4[4]
P4[6]
P2[0]
P2[2]
P2[4]
P2[6]
P0[0]
P0[2]
P0[4]
P0[6]
Vdd
P0[7]
P0[5]
P0[3]
P0[1]
P2[7]
Crystal Input (XTALin), I2C Serial Clock (SCL),
ISSP-SCLK*.
Ground connection.
Crystal Output (XTALout), I2C Serial Data (SDA),
ISSP-SDATA*.
Optional External Clock Input (EXTCLK).
Active high external reset with internal pull down.
I
I
I
IO
IO
I
Direct switched capacitor block input.
Direct switched capacitor block input.
External Analog Ground (AGND).
External Voltage Reference (VRef).
Analog column mux input.
Analog column mux input and column output.
Analog column mux input and column output.
Analog column mux input.
Supply voltage.
Analog column mux input.
Analog column mux input and column output.
Analog column mux input and column output.
Analog column mux input.
LEGEND:
A = Analog, I = Input, and O = Output.
* These are the ISSP pins, which are not High Z at POR (Power On Reset). See the
PSoC Programmable System-on-Chip Technical Reference Manual
for details.
Document Number: 38-12012 Rev. *M
P3[1]
I2CSCL, P1[7]
I2C SDA, P1[5]
P1[3]
I2CSCL,XTALin,P1[1]
Vss
I2CSDA,XTALout,P1[0]
P1[2]
EXTCLK,P1[4]
P1[6]
P3[0]
I2C Serial Clock (SCL).
I2C Serial Data (SDA).
12
13
14
15
16
17
18
19
20
21
22
P2[5]
A, I, P2[3]
A, I, P2[1]
P4[7]
P4[5]
P4[3]
P4[1]
SMP
P3[7]
P3[5]
P3[3]
1
2
3
4
5
6
7
8
9
10
11
44
43
42
41
40
39
38
37
36
35
34
P2[7]
P0[1], A, I
P0[3], A, IO
P0[5], A, IO
P0[7], A, I
Vdd
TQFP
Page 10 of 53
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