DS26504LNB2 Maxim Integrated Products, DS26504LNB2 Datasheet - Page 39

• Manufacturer Part Number: DS26504LNB2
• Description: Network Controller & Processor ICs T1-E1-J1-64kHz Compo 4kHz Composite Clock
• Manufacturer: Maxim Integrated Products

Specifications of DS26504LNB2

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.7 Interrupt Information Registers
The Interrupt Information Registers (IIRs) provide an indication of which Status Registers (SR1 to SR4)
are generating an interrupt. When an interrupt occurs, the host can read IIR to quickly identify which of
the four status registers are causing the interrupt.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
HW
Mode
Bit 0: Status Register 1 (SR1)
Bit 1: Status Register 2 (SR2)
Bit 2: Status Register 3 (SR3)
Bit 3: Status Register 4 (SR4)
Bit 4: Status Register 5 (SR5)
Bits 5 to 7: Unused
0 = Status Register 1 interrupt not active.
1 = Status Register 1 interrupt active.
0 = Status Register 2 interrupt not active.
1 = Status Register 2 interrupt active.
0 = Status Register 3 interrupt not active.
1 = Status Register 3 interrupt active.
0 = Status Register 4 interrupt not active.
1 = Status Register 4 interrupt active.
0 = Status Register 5 interrupt not active.
1 = Status Register 5 interrupt active.
—
X
7
0
—
IIR
Interrupt Information Register
13h
X
6
0
—
X
5
0
SR5
X
4
0
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SR4
X
3
0
SR3
X
2
0
SR2
X
1
0
SR1
X
0
0