EM78612 Datasheet, PDF (25/28 Pages) ELAN Microelectronics Corp – Universal Serial Bus Microcontroller

EM78612
Universal Serial Bus Microcontroller
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
Temperature under bias
Storage temperature
Input voltage
Output voltage
Min
Max
Unit
0
70
Ċ
-65
150
Ċ
-0.5
6.0
V
-0.5
6.0
V
Product Specification (V1.1) 04.28.2004
21
(This specification is subject to change without further notice)