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參數(shù)資料
| 型號(hào)： | EM78612 |
| 英文描述： | Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 16-QFN |
| 中文描述： | USB控制器 |
| 文件頁數(shù)： | 17/29頁 |
| 文件大?。?/td> | 692K |
| 代理商： | EM78612 |
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EM78612
Universal Serial Bus Microcontroller Series
This specification may change without further notice.
24
3/5/2003 (V1.0)
8.7
Interrupt
The EM78612 has two interrupt vectors, one is in 0x0001, and the other is in 0x000A. When
an interrupt occurs while the MCU is running, it will jump to the interrupt vector (0x0001 or
0x000A) and execute the instructions sequentially from interrupt vector. RF is the interrupt
status register that records the interrupt status in the relative flags/bits.
The interrupt condition could be one of the following:
1. TCC Overflow
When the Timer Clock / Counter Register (R1) overflows, the
status flag RF[0] will be set to 1. Its interrupt vector is 0X0001.
2. EP0 Interrupt
When the UDC successfully received a setup transaction from
host to EndPoint0, the status flag RF[1] will be set to 1. Its
interrupt vector is 0X000A.
3. USB Suspend
When UDC detects a USB Suspend signal on USB bus, the
status flag RF[2] will be set to 1. Its interrupt vector is 0X000A.
4. USB Reset
When the UDC detects a USB Reset signal on USB bus, the
status flag R[3] will be set to 1. Its interrupt vector is 0X000A.
5. USB Host Resume
When UDC detects that the USB bus has left the Suspend
condition, the status flag R[4] will be set to 1. Its interrupt vector is
0X000A.
6. Port 5 State Change
When the input signals in Port 5 changes, the status flag RF[4]
will be set to 1. Its interrupt vector is 0X0001.
IOCF is an interrupt mask register which can be set individually bit by bit. While their
respective bit is written to 0, the hardware interrupt will inhibit, that is, the EM78612 will not
jump to the interrupt vector to execute instructions. But the interrupt status flags still records
the conditions no matter whether the interrupt is masked or not. The interrupt status flags
must be cleared by firmware before leaving the interrupt service routine and enabling
interrupt.
The global interrupt is enabled by the ENI (RETI) instruction and is disabled by the DISI
instruction.
8 Absolute Maximum Ratings
Symbol
Min
Max
Unit
Temperature under bias
0
70
C
Storage temperature
-65
150
C
Input voltage
-0.5
6.0
V
Output voltage
-0.5
6.0
V
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