Specifications
CY7C6431x
CY7C6434x
CY7C6435x
Document Number: 001-12394 Rev. *R Page 11 of 40
48-pin Part Pinout
Figure 8. CY7C64355/CY7C64356 48-pin enCoRe V USB Device
QFN
(Top View)
P0[1]
V
SS
P0[3]
P0[5]
P0[7]
V
DD
P0[6]
10
11
12
P2[7]
P2[5]
P2[3]
P2[1]
P4[3]
P4[1]
P3[7]
P3[5]
P3[3]
35
34
33
32
31
30
29
28
27
26
25
36
48
47
46
45
44
43
42
41
40
39
38
37
P0[2]
P0[0]
P2[6]
P2[4]
P2[2]
P2[0]
P3[2]
P3[0]
XRES
P1[6]
P0[4]
1
2
3
4
5
6
7
8
9
13
14
15
16
17
18
19
20
21
22
23
24
NC
NC
P1[3]
P1[1]
V
SS
D+
D-
V
DD
P1[0]
P1[2]
P1[4]
NC
P3[1]
P1[7]
P1[5]
P3[4]
P3[6]
P4[0]
P4[2]
NC
NC
Table 3. 48-pin Part Pinout (QFN)
Pin No. Type Pin Name Description
1NCNC No connection
2 I/O P2[7] Digital I/O
3 I/O P2[5] Digital I/O, crystal out (Xout)
4 I/O P2[3] Digital I/O, crystal in (Xin)
5 I/O P2[1] Digital I/O
6 I/O P4[3] Digital I/O
7 I/O P4[1] Digital I/O
8 I/O P3[7] Digital I/O
9 I/O P3[5] Digital I/O
10 I/O P3[3] Digital I/O
11 I/O P3[1] Digital I/O
12 I/OHR P1[7] Digital I/O, I
2
C SCL, SPI SS
13 I/OHR P1[5] Digital I/O, I
2
C SDA, SPI MISO
14 NC NC No connection
15 NC NC No connection
16 I/OHR P1[3] Digital I/O, SPI CLK
17 I/OHR P1[1]
[5, 6]
Digital I/O, ISSP CLK, I
2
C SCL, SPI MOSI
18 Power
V
SS
Supply ground
19 I/O D+ USB
20 I/O D– USB
21 Power V
DD
Supply voltage
22 I/OHR P1[0]
[5, 6]
Digital I/O, ISSP DATA, I
2
C SDA, SPI CLK
23 I/OHR P1[2] Digital I/O
Notes
5. During power up or reset event, device P1[0] and P1[1] may disturb the I
2
C bus. Use alternate pins if issues are encountered.
6. These are the in-system serial programming (ISSP) pins that are not High Z at power on reset (POR).