CY7C65640A

Document #: 38-08019 Rev. *J

Page 6 of 23

Table 0-1. CY7C65640APin Assignments

Pin

Name

Type

Default

Description

3

VCC

Power

N/A

7

VCC

Power

N/A

11

VCC

Power

N/A

15

VCC

Power

N/A

19

VCC

Power

N/A

23

VCC

Power

N/A

27

VCC

Power

N/A

33

VCC

Power

N/A

39

VCC

Power

N/A

45

VCC

Power

N/A

55

VCC

Power

N/A

4GND

Power

N/A

GND. Connect to Ground with as short a path as possible.

8GND

Power

N/A

GND. Connect to Ground with as short a path as possible.

12

GND

Power

N/A

GND. Connect to Ground with as short a path as possible.

16

GND

Power

N/A

GND. Connect to Ground with as short a path as possible.

20

GND

Power

N/A

GND. Connect to Ground with as short a path as possible.

24

GND

Power

N/A

GND. Connect to Ground with as short a path as possible.

28

GND

Power

N/A

GND. Connect to Ground with as short a path as possible.

34

GND

Power

N/A

GND. Connect to Ground with as short a path as possible.

40

GND

Power

N/A

GND. Connect to Ground with as short a path as possible.

47

GND

Power

N/A

GND. Connect to Ground with as short a path as possible.

50

GND

Power

N/A

GND. Connect to Ground with as short a path as possible.

56

GND

Power

N/A

GND. Connect to Ground with as short a path as possible.

21

XIN

Input

N/A

24-MHz Crystal IN or External Clock Input.

22

XOUT

Output

N/A

24-MHz Crystal OUT.

46

RESET#

Input

N/A

through a 100K resistor, and to GND through a 0.1-µF capacitor. Other than this,

no other special power-up procedure is required.

26

BUSPOWER

Input

N/A

VBUS. Connect to the VBUS pin of the upstream connector. This signal indicates

to the hub that it is in a powered state, and may enable the D+ pull-up resistor

to indicate a connection. (The hub will do so after the external EEPROM is read,

unless it is put into a high speedhigh speedhigh speed mode by the upstream

hub). The hub can not be bus powered, and the VBUS signal must not be used

as a power source.

SPI INTERFACE

25

SPI_CS

O

O

SPI Chip Select. Connect to CS pin of the EEPROM.

48

SPI_SCK

O

O

SPI Clock. Connect to EEPROM SCK pin.

49

SPI_SD

I/O/Z

Z

SPI Dataline Connect to GND with 15-K

Ω resistor and to the Data I/O pins of

the EEPROM.

UPSTREAM PORT

17

D–

I/O/Z

Z

Upstream D– Signal.

18

D+

I/O/Z

Z

Upstream D+ Signal.

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