CY7C656xx
Document #: 38-08037 Rev. *J
Page 7 of 25
Pin Description Table
Table 3. Pin Assignments[3]
Pin
CY7C65630
Name
CY7C65620
Name
Type Default
Description
3
VCC
VCC
Power
N/A
VCC. This signal provides power to the chip.
7
VCC
VCC
Power
N/A
VCC. This signal provides power to the chip.
11
VCC
VCC
Power
N/A
VCC. This signal provides power to the chip.
15
VCC
VCC
Power
N/A
VCC. This signal provides power to the chip.
19
VCC
VCC
Power
N/A
VCC. This signal provides power to the chip.
23
VCC
VCC
Power
N/A
VCC. This signal provides power to the chip.
27
VCC
VCC
Power
N/A
VCC. This signal provides power to the chip.
33
VCC
VCC
Power
N/A
VCC. This signal provides power to the chip.
39
VCC
VCC
Power
N/A
VCC. This signal provides power to the chip.
55
VCC
VCC
Power
N/A
VCC. This signal provides power to the chip.
4
GND
GND
Power
N/A
GND. Connect to Ground with as short a path as possible.
8
GND
GND
Power
N/A
GND. Connect to Ground with as short a path as possible.
12
GND
GND
Power
N/A
GND. Connect to Ground with as short a path as possible.
16
GND
GND
Power
N/A
GND. Connect to Ground with as short a path as possible.
20
GND
GND
Power
N/A
GND. Connect to Ground with as short a path as possible.
24
GND
GND
Power
N/A
GND. Connect to Ground with as short a path as possible.
28
GND
GND
Power
N/A
GND. Connect to Ground with as short a path as possible.
34
GND
GND
Power
N/A
GND. Connect to Ground with as short a path as possible.
40
GND
GND
Power
N/A
GND. Connect to Ground with as short a path as possible.
47
GND
GND
Power
N/A
GND. Connect to Ground with as short a path as possible.
50
GND
GND
Power
N/A
GND. Connect to Ground with as short a path as possible.
56
GND
GND
Power
N/A
GND. Connect to Ground with as short a path as possible.
21
XIN
XIN
Input
N/A
24-MHz Crystal IN or External Clock Input.
22
XOUT
XOUT
Output
N/A
24-MHz Crystal OUT. (NC if external clock is used)
46
RESET#
RESET#
Input
N/A
Active LOW Reset. This pin resets the entire chip. It is normally
tied to VCC through a 100K resistor, and to GND through a
0.1-µF capacitor. Other than this, no other special power up
procedure is required.
45
SELFPWR
SELFPWR
Input
N/A
Self Power. Indicator for bus or self powered. 0 is bus powered,
1 is self powered.
26
VBUSPOWER
VBUSPOWER
Input
N/A
VBUS. Connect to the VBUS pin of the upstream connector.
This signal indicates to the hub that it is in a connected state,
and may enable the D+ pull up resistor to indicate a connection.
(The hub does so after the external EEPROM is read).
SPI Interface
25
SPI_CS
SPI_CS
Output
O
SPI Chip Select. Connect to CS pin of the EEPROM.
48
SPI_SCK
SPI_SCK
Output
O
SPI Clock. Connect to EEPROM SCK pin.
49
SPI_SD
SPI_SD
I/O/Z
Z
SPI Dataline Connect to GND with 15-K
Ω resistor and to the
Data I/O pin of the EEPROM.
Note
3. Unused port DD+/DD– lines can be left floating. Leave the port power, amber, and green LED pins unconnected, and deassert the overcurrent pin. Do not leave
the overcurrent pin floating; it is an input.
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