L64780 LSI Logic Corporation, L64780 Datasheet - Page 59

• Manufacturer Part Number: L64780
• Description: Dvb-t Cofdm Demodulator Technical Manual 2/00
• Manufacturer: LSI Logic Corporation

4.2 Interrupt Registers
4.2.1 Address Line 0x00
The DTTV demodulator generates interrupts based on events in specific
functional blocks of the chip. These events are reported to the Interrupt
register. Two types of events might be of interest to an external
microcontroller:
The Interrupt register at address 0x00 provides the microprocessor with
events on the DTTV demodulator that can cause an internal interrupt.
This read-only register contains a bitmap indicating which events took
place. It is associated with the Interrupt Mask register.
RES
SYNC_CHANGE
Interrupt Registers
0x00
Events relating to severe impairments. The external microcontroller
must evaluate the severity of these events and take the necessary
corrective action.
Events relating to changes in the operation of the DTTV
demodulator. These occur during normal operation and are made
available to the external microcontroller for monitoring.
7
Reserved
These bits are reserved.
Synchronization Change Interrupt
This bit indicates if one or more aspects of the DTTV
demodulator synchronization have changed.
The initial condition for the SYNC_CHANGE bit is 0 (no
interrupt). If this bit is set to 1, an interrupt is generated.
RES
2
SYNC_CHANGE TPS_INFO_CHANGE
1
0
[7:2]
R 1
4-7