CY7C656x
x
PRELIMINARY
Document #: 38-08037 Rev. *D Page 8 of 23
7.0 Pin Description Table
Table7-1 below displays the pin assignments.
Table 7-1. Pin Assignments[3]
CY7C65640B /
CY7C65630 Pin CY7C65620
Pin Name Type Default Description
3 3 VCC Power N/A VCC. This signal provides power to the chip.
7 7 VCC Power N/A VCC. This signal provides power to the chip.
11 11 VCC Pow er N/A VCC. This signal provides power to the chip.
15 15 VCC Power N/A VCC. This signal provides power to the chip.
19 19 VCC Power N/A VCC. This signal provides power to the chip.
23 23 VCC Power N/A VCC. This signal provides power to the chip.
27 27 VCC Power N/A VCC. This signal provides power to the chip.
33 33 VCC Power N/A VCC. This signal provides power to the chip.
39 39 VCC Power N/A VCC. This signal provides power to the chip.
55 55 VCC Power N/A VCC. This signal provides power to the chip.
4 4 GND Power N/A GND. Connect to Ground with as short a path as possible.
8 8 GND Power N/A GND. Connect to Ground with as short a path as possible.
12 12 GND Power N/A GND. Connect to Ground with as short a path as possible.
16 16 GND Power N/A GND. Connect to Ground with as short a path as possible.
20 20 GND Power N/A GND. Connect to Ground with as short a path as possible.
24 24 GND Power N/A GND. Connect to Ground with as short a path as possible.
28 28 GND Power N/A GND. Connect to Ground with as short a path as possible.
34 34 GND Power N/A GND. Connect to Ground with as short a path as possible.
40 40 GND Power N/A GND. Connect to Ground with as short a path as possible.
47 47 GND Power N/A GND. Connect to Ground with as short a path as possible.
50 50 GND Power N/A GND. Connect to Ground with as short a path as possible.
56 56 GND Power N/A GND. Connect to Ground with as short a path as possible.
21 21 XIN Input N/A 24-MHz Crystal IN or External Clock Input.
22 22 XOUT Outpu
tN/A 24-MHz Crystal OUT.
46 46 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 45 SELFPWR Input N/A Indicator for bus/self powered. 0 is bus powered, 1 is self-
powered.
26 26 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 will do so after the external EEPROM is
read, unless it is put into a high-speed m ode by the upstream
hub).
SPI Interface
25 25 SPI_CS O O SPI Chip Select. Connect to CS pin of the EEPROM.
48 48 SPI_SCK O O SPI Clock. Connect to EEPROM SCK pin.
49 49 SPI_SD I /O/Z Z SPI Dataline Connect to GND with 15-KΩ resistor and to the
Data I/O pins of the EEPROM.
Note:
3. Unused port DD+/DD– lines can be left floating. The port power, amber, and green LED pin s should be left unconnected, and the overcurrent pin should be
tied HIGH. The overcurrent pin is an input and it should not be left floati ng.