ST92163 datasheet(146/224 Pages) STMICROELECTRONICS

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ST92163 - USB PERIPHERAL (USB)

USB INTERFACE (Cont’d)

8.3.4.3 Miscellaneous Registers

These registers contain device configuration pa-

rameters or optional functions of USB interface.

DEVICE CONFIGURATION 1 (DEVCONF1)

R244 - Read/Write

Reset value: 0000 1111 (0Fh)

This register contains device configuration data

that should be written by the software at the begin-

ning of the application program and should never

be changed during normal operations.

Bit 7:6 = Reserved. This bit is fixed by hardware at

Bit 6 = Reserved. Must be kept at 0.

Bit 5 = USBOE_EN:

USBOE Signal Enable.

Set by software to enable the alternate output

function connected to the upstream output enable

signal.

1: USBOE signal output enabled

0: USBOE signal output disabled

Bit 4 = Reserved.

Bits 3:0 = Reserved. These bits are fixed by hard-

ware at 1.

DEVICE CONFIGURATION 2 (DEVCONF2)

R245 - Read/Write

Reset value: 0000 0000 (00h)

This register contains device configuration data

that should be written by the software at the begin-

ning of the application program and should never

be changed during normal operations.

Bits 7:2 = Reserved. These bits must be always

written to 0.

Bit 1 = LVD_DISABLE:

Low Voltage Detector Dis-

able

Set by the software to disable the generation of

the device reset signal by the LVD.

1: LVD disabled

0: LVD enabled

If this bit is at 0, an internal reset can be issued

both by the external RESET pin and the LVD when

it detects a low supply voltage; if this bit is at 1 only

the external pad can start a device reset.

Note: this bit can be only set to 1 by software, writ-

ing 0 has no effect and the LVD can be re-enabled

only using a device reset.

USBOE

_EN

LS_

DEVICE

111

000000

LVD_

DISAB LE

SOFP_

ENAB LE

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