STW4810CHDRLF datasheet(22/78 Pages) STMICROELECTRONICS

22 / 78 page

Functional description

STw4810

22/78

Registers controlled by I2C USB bus

The registers described in this chapter are controlled through the USB serial I2C interface,

USBSCL and USBSDA balls.

These registers could also be controlled through the main I2C interface, SCL and SDA balls

by setting to “1” USB-I2C_CTRL bit in Power control register (

Table 23).

Note:

A bit of register 1 is set at “1” by writing a “1” at address 04h, is reset at “0” by writing a “1” at

address 05h. This is also applicable for USB Control Register 2 (06h, 07h), USB Interrupt

True register (0Eh, 0Fh). Writing “0” at any address has not effect on the content of any

Table 8.

Power control register

Addr.

Power control

1Fh

Not used

reg address 2 bits

Addr.

Power control

1 Eh

reg address 3 bits

data din/dout 4 bits

ena write

Table 9.

USB register address

Address

Type

00h - 01h

Vendor ID

02h - 03h

Product ID

04h set

USB Control Register 1

R/W

05h clearh

USB Control Register 1

R/W

06h set

USB Control Register 2

R/W

07h clearh

USB Control Register 2

R/W

08h

USB Interrupt Source

09h

Not used

0Ah set

USB Interrupt Latch

R/W

0Bh clearh

USB Interrupt Latch

R/W

0Ch set

USB Interrupt Mask False

R/W

0Dh clearh

USB Interrupt Mask False

R/W

0Eh set

USB Interrupt Mask True

R/W

0Fh clearh

USB Interrupt Mask True

R/W

10h

USB_EN

R/W

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