
137
AT85C51SND3Bx
7632A–MP3–03/06
Reset Value = 0000 0000b
4 RXRSMI
Upstream Resume Received Interrupt
Set by hardware when an Upstream Resume has been received from the
Device.
Shall be cleared by software. Setting by software has no effect.
3 RSMEDI
Downstream Resume Sent Interrupt
Set by hardware when a Downstream Resume has been sent to the Device.
Shall be cleared by software. Setting by software has no effect.
2 RSTI
USB Reset Sent Interrupt
Set by hardware when a USB Reset has been sent to the Device.
Shall be cleared by software. Setting by software has no effect.
1 DDISCI
Device Disconnection Interrupt
Set by hardware when the device has been removed from the USB bus.
Shall be cleared by software. Setting by software has no effect.
0 DCONNI
Device Connection Interrupt
Set by hardware when a new device has been connected to the USB bus.
Shall be cleared by software. Setting by software has no effect.
Table 134. UHIEN Register
UHIEN (1.DAh) – USB Host General Interrupt Enable Register
7 6 5 4 3 2 1 0
- HWUPE HSOFE RXRSME RSMEDE RSTE DDISCE DCONNE
Bit
Number
Bit
Mnemonic
Description
7 -
Reserved
The value read from this bit is always 0. Do not set this bit.
6 HWUPE
Host Wake-Up Interrupt Enable
Set this bit to enable HWUP interrupt.
Clear this bit to disable HWUP interrupt.
5 HSOFE
Host Start Of frame Interrupt Enable
Set this bit to enable HSOF interrupt.
Clear this bit to disable HSOF interrupt.
4 RXRSME
Upstream Resume Received Interrupt Enable
Set this bit to enable the RXRSMI interrupt.
Clear this bit to disable the RXRSMI interrupt.
3 RSMEDE
Downstream Resume Sent Interrupt Enable
Set this bit to enable the RSMEDI interrupt.
Clear this bit to disable the RSMEDI interrupt.
2 RSTE
USB Reset Sent Interrupt Enable
Set this bit to enable the RSTI interrupt.
Clear this bit to disable the RSTI interrupt.
1 DDISCE
Device Disconnection Interrupt Enable
Set this bit to enable the DDISCI interrupt.
Clear this bit to disable the DDISCI interrupt.
Bit
Number
Bit
Mnemonic Description
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