HT82M99AE datasheet(21/47 Pages) HOLTEK

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HT82M99EE/HT82M99AE

Rev. 1.00

February 8, 2006

The SIES Register is used to indicate the present signal state which the USB SIE received and also determines

whether the USB SIE has to change the device address automatically.

Bit No.

Function

Read/Write

MNI

R/W

01000101B

EOT

CRC_ERR

R/W

NAK

3IN

OUT

R/W

F0_ERR

R/W

Adr_set

R/W

SIES (45H) Registers Table

Function

Name

Read/Write

Description

Adr_set

R/W

This bit is used to configure the USB SIE to automatically change the device address with

the value of the Address+Remote_WakeUp Register (42H).

When this bit is set to 1 by F/W, the USB SIE will update the device address with the value

of the Address+Remote_WakeUp Register (42H) after the PC Host has successfully read

the data from the device by the IN operation. The USB SIE will clear the bit after updating

the device address.

Otherwise, when this bit is cleared to

²0², the USB SIE will update the device address im-

mediately after an address is written to the Address+Remote_WakeUp Register (42H).

F0_Err

R/W

This bit is used to indicate when there are some errors that occurred when the FIFO0 is

accessed.

This bit is set by the USB SIE and cleared by F/W.

Out

R/W

This bit is used to indicate that there are OUT token (except for the OUT zero) that has

been received. The F/W clears the bit after the OUT data has been read. Also, this bit will

be cleared by the USB SIE after the next valid SETUP token is received.

This bit is used to indicate that the current USB receiving signal from the PC Host is IN to-

ken.

NAK

This bit is used to indicate that the USB SIE has transmitted the NAK signal to the Host in

response to the PC Host IN or OUT token.

CRC_err

R/W

This bit indicates that there are CRC error (bit=1). The programmer must do something to

save the device and keep it alive.

This bit is set by the USB SIE and cleared by F/W.

EOT

End of transient flag, normal status is

²1². If suspend=²1² line & EOT=²0² indicates that

something is wrong in the USB Interface. The programmer must do something to save the

device and keep it alive.

MNI

R/W

This bit is for masking the NAK interrupt when MNI=

²1², the default value=²0²

SIES Function Table

HT82M99AE Datasheet(PDF) 21 Page - Holtek Semiconductor Inc

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