Interrupts; Interrupt Request Output Operation - Analog Devices Advantiv ADV7604 Hardware Manual

14 Interrupts

14.1 Interrupts
The ADV7604 has a comprehensive set of interrupt registers located in the IO Map. Two pins,
INT1 and INT2, can be configured to output an interrupt signal. The
must be configured accordingly in order to output INT2.
INT2_EN, IO Map, Address 0x41, [2]
Function
INT2_EN
0
1
Notes:
• INT1 is in a high impedance state after reset as the ADV7604 resets with Open Drain enabled
on INT1.
• The ADV7604 resets with the SYNC_OUT function enabled on the SYNC_OUT/INT2 pin.
The INT2_EN
SYNC_OUT/INT2 pin.
• The ADV7604 resets with all interrupts masked off on INT1 and INT2.
• An interrupt is enabled for a specific event by masking the corresponding mask bit in the I0
Map.

14.1.1 Interrupt Request Output Operation

The interrupt duration can be programmed independently for INT1 and INT2. When an interrupt
event occurs, the interrupt pin INT1 or INT2 becomes active with a programmable duration from
INTRQ_DUR_SEL[1:0] or INTRQ2_DUR_SEL[1:0] respectively.
INTRQ2_DUR_SEL[1:0] , IO Map, Address 0x41, [7:6]
Function
INTRQ2_DUR_SEL[1:0]
00
01
10
11
INTRQ_DUR_SEL[1:0] , IO Map, Address 0x40, [7:6]
Function
INTRQ_DUR_SEL[1:0]
00
01
10
11
Rev. F August 2010
Description
Enables SYNC_OUT function (disables INT2 function)
Enables INT2 function (disables SYNC_OUT function)
bit in the IO Map must be set in order to enable the INT2 function on the
Selects for INT1 interrupt duration
4 XTAL periods
16 XTAL periods
64 XTAL periods
Active until cleared
Selects for INT2 interrupt duration
4 XTAL periods
16 XTAL periods
64 XTAL periods
Active until cleared
374
INT2_EN bit in the IO Map
ADV7604