STW4811M STMicroelectronics, STW4811M Datasheet - Page 24

• Manufacturer Part Number: STW4811M
• Description: Power Management For Multimedia Processors
• Manufacturer: STMicroelectronics

Functional description
Note:
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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 can 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 9.
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
register (0Ah,0Bh), USB interrupt mask false register (0Ch, 0Dh) and USB interrupt mask
true register (0Eh, 0Fh). Writing “0” at any address has not effect on the content of any
register.
Table 10.
00h - 01h
02h - 03h
04h set
05h clearh
06h set
07h clearh
08h
09h
0Ah set
0Bh clearh
0Ch set
0Dh clearh
0Eh set
0Fh clearh
10h
Vendor ID
Vendor ID
Product ID
Address
Name
USB register address
Vendor ID and Product ID: Read only
Vendor ID
Product ID
USB control register 1
USB control register 1
USB control register 2
USB control register 2
USB interrupt source
Not used
USB interrupt latch
USB interrupt latch
USB interrupt mask false
USB interrupt mask false
USB interrupt mask true
USB interrupt mask true
USB_EN
Register
Address
00h
01h
02h
03h
Table 23
).
STw4811M/STw4811N
Register value
R
R
R/W
R/W
R/W
R/W
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
83h
04h
11h
40h
Type