AT89C5131A-RDTIM Atmel, AT89C5131A-RDTIM Datasheet - Page 137
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AT89C5131A-RDTIM
Manufacturer Part Number
AT89C5131A-RDTIM
Description
C5131A 32K FLASH USB VQFP64 IND, 5V
Manufacturer
Atmel
Datasheet
1.AT89C5131A-RDTIM.pdf
(176 pages)
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4136C–USB–04/05
Table 91. USBINT Register
USBINT (S:BDh)
USB Global Interrupt Register
Reset Value = 00h
Bit Number
7-6
7
-
5
4
3
2
1
0
Mnemonic Description
WUPCPU
EORINT
SOFINT
SPINT
Bit
6
-
-
-
-
Reserved
The value read from these bits is always 0. Do not set these bits.
Wake Up CPU Interrupt
This bit is set by hardware when the USB controller is in SUSPEND state and is
re-activated by a non-idle signal FROM USB line (not by an upstream resume).
This triggers a USB interrupt when EWUPCPU is set in Figure 92 on page 136.
When receiving this interrupt, user has to enable all USB clock inputs.
This bit will be cleared by software (USB clocks must be enabled before).
End Of Reset Interrupt
This bit is set by hardware when a End Of Reset has been detected by the USB
controller. This triggers a USB interrupt when EEORINT is set in the Figure 92
(see Figure 92 on page 136).
This bit will be cleared by software.
Start of Frame Interrupt
This bit is set by hardware when an USB Start of Frame PID (SOF) has been
detected. This triggers a USB interrupt when ESOFINT is set in the Figure 92
(see Figure 92 on page 136).
This bit will be cleared by software.
Reserved
The value read from this bit is always 0. Do not set this bit.
Reserved
The value read from this bit is always 0. Do not set this bit.
Suspend Interrupt
This bit is set by hardware when a USB Suspend (Idle bus for three frame
periods: a J state for 3 ms) is detected. This triggers a USB interrupt when
ESPINT is set in see Figure 92 on page 136.
This bit will be cleared by software BEFORE any other USB operation to re-
activate the macro.
WUPCPU
5
EORINT
4
SOFINT
3
2
-
AT89C5131
1
-
SPINT
0
135
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