Rainbow-electronics AT89C51SND1C Instrukcja Użytkownika Pobierz pdf (Strona 101)

101

AT8xC51SND1C

4109E–8051–06/03

Table 93. USBIEN Register

USBIEN (S:BEh) – USB Global Interrupt Enable Register

Reset Value = 0001 0000b

Table 94. UEPNUM Register

UEPNUM (S:C7h) – USB Endpoint Number

Reset Value = 0000 0000b

76543210

- - EWUPCPU EEORINT ESOFINT - - ESPINT

Bit

Number

Bit

Mnemonic Description

7 - 6 -

Reserved

The value read from these bits is always 0. Do not set these bits.

5EWUPCPU

Wake Up CPU Interrupt Enable Bit

Set to enable the Wake Up CPU interrupt.

Clear to disable the Wake Up CPU interrupt.

4EEOFINT

End Of Reset Interrupt Enable Bit

Set to enable the End Of Reset interrupt. This bit is set after reset.

Clear to disable End Of Reset interrupt.

3ESOFINT

Start Of Frame Interrupt Enable Bit

Set to enable the SOF interrupt.

Clear to disable the SOF interrupt.

2 - 1 -

Reserved

The value read from these bits is always 0. Do not set these bits.

0ESPINT

Suspend Interrupt Enable Bit

Set to enable Suspend interrupt.

Clear to disable Suspend interrupt.

76543210

------EPNUM1EPNUM0

Bit

Number

Bit

Mnemonic Description

7 - 2 -

Reserved

The value read from these bits is always 0. Do not set these bits.

1 - 0 EPNUM1:0

Endpoint Number Bits

Set this field with the number of the endpoint which should be accessed when

reading or writing to registers UEPSTAX, UEPDATX, UBYCTX or UEPCONX.

1 2 ... 96 97 98 99 100 101 102 103 104 105 106 ... 209 210

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