CY7C65632-28LTXC CYPRESS [Cypress Semiconductor], CY7C65632-28LTXC Datasheet - Page 14

• Manufacturer Part Number: CY7C65632-28LTXC
• Manufacturer: CYPRESS [Cypress Semiconductor]

EEPROM Configuration Options
Systems using CY7C6563X have the option of using the default
descriptors to configure the hub. Otherwise, it must have an
external EEPROM for the device to have a unique VID, and PID.
The CY7C6563X can communicate with an SPI (microwire)
EEPROM like 93C46 or I2C EEPROM like 24C02. Example
EEPROM connections are as shown in the following figure.
Note The 28-pin QFN package includes only support for I2C
EEPROM like ATMEL/24C02N_SU27 D, MICROCHIP/4LC028
SN0509, SEIKO/S24CS02AVH9. The 48-pin TQFP package
includes both I2C and SPI EEPROM connectivity options. In this
case, user can use either SPI or I2C connectivity at a time for
communicating to EEPROM. The 48-pin package supports
ATMEL/AT93C46DN-SH-T, in addition to the above mentioned
families. HX2VL can only read from SPI EEPROM. So, field
programming of EEPROM is supported only for I2C EEPROM.
CY7C6563X verifies the check sum after power on reset and if
validated loads the configuration from the EEPROM. To prevent
this configuration from being overwritten, AMBER[1] is disabled
when SPI EEPROM is present.
Document Number: 001-67568 Rev. *F
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h–0Fh
Byte
AMBER#[1]
GREEN#[1]
AMBER#[2]
GREEN#[2]
SPI EEPROM Connection
I2C EEPROM Connection
CS
SK
DI
DO
A0
A1
A2
GND
VID_LSB
VID_MSB
PID_LSB
PID_MSB
ChkSum
Reserved - FEh
Removable Ports
Port Number
Maximum Power
Reserved - FFh (except 0Bh is FEh)
AT93C46
AT24C02
VCC
GND
NC1
NC2
VCC
SDA
SCL
WP
Value
VDD
VDD
TEST
PWR#[1]
Default VID is 0x4B4, PID is 0x6570.
Byte 0: VID (LSB)
Byte 1: VID (MSB)
Byte2: PID (LSB)
Byte 3: PID (MSB)
Byte 4: ChkSum
Byte 5: Reserved
Byte 6: RemovablePorts
Byte 7: Port Number
Byte 8: Maximum Power
Byte 9–15: Reserved
Byte 16: Vendor String Length
Byte 17–63: Vendor String
Byte 64: Product String Length
Byte 65–111: Product String
10h
11h–3Fh
40h
41h–6Fh
70h
71h to 80h onwards
Least Significant Byte of Vendor ID
Most Significant Byte of Vendor ID
Least Significant Byte of Product ID
Most Significant Byte of Product ID
CY7C6563X will ignore the EEPROM settings if ChkSum is
not equal to VID_LSB + VID_MSB + PID_LSB + PID_MSB +1
Set to FEh
RemovablePorts[4:1] are the bits that indicates whether the
device attached to the corresponding downstream port is
removable (set to 0) or non-removable (set to 1). Bit 1
corresponds to Port 1, Bit 2 to Port 2 and so on. Default value
is 0 (removable). These bit values are reported appropriately
in the HubDescriptor:DeviceRemovable field.
Bits 0,5,6,7 are set to 0.
Port Number indicates the number of downstream ports. The
values must be 1 to 4. Default value is 4.
This value is reported in the Configuration Descriptor:
bMax-Power field and is the current in 2 mA increments that
is required from the upstream hubs. The allowed range is 00h
(0 mA) to FAh(500 mA). Default value is 32h (100mA).
Set to FFh (except 0Bh is FEh)
Length of the Vendor String
Value of Vendor String.
Length of the Product String
Value of Product String.
Byte
CY7C65632, CY7C65634
Vendor String Length
Vendor String (ASCII code)
Product String Length
Product String (ASCII Code)
Serial Number Length
Serial Number String
Value
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