DS26502LB1 Maxim Integrated Products, DS26502LB1 Datasheet - Page 39
DS26502LB1
Manufacturer Part Number
DS26502LB1
Description
Timers & Support Products E1-T1-J1-64KCC BITS Element 64kHz - G.70
Manufacturer
Maxim Integrated Products
Datasheet
1.DS26502LN.pdf
(125 pages)
Specifications of DS26502LB1
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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7.6 Information Registers
Information registers operate the same as status registers except they cannot cause interrupts. INFO3
register is a read-only register and it reports the status of the E1 synchronizer in real time. INFO3
information bits are not latched, and it is not necessary to precede a read of these bits with a write.
7.7 Interrupt Information Registers
The Interrupt Information Registers provide an indication of which Status Registers (SR1 through SR4)
are generating an interrupt. When an interrupt occurs, the host can read IIR to quickly identify which of
the three 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)
Bits 4 to 7: Unused
0 = Status Register 1 interrupt not active.
1 = Status Register 1 interrupt active.
0 = Status Register 1 interrupt not active.
1 = Status Register 1 interrupt active.
0 = Status Register 1 interrupt not active.
1 = Status Register 1 interrupt active.
0 = Status Register 1 interrupt not active.
1 = Status Register 1 interrupt active.
—
X
7
0
—
IIR
Interrupt Information Register
13h
X
6
0
—
X
5
0
—
X
4
0
39 of 125
SR4
X
3
0
SR3
X
2
0
SR2
X
1
0
SR1
X
0
0
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