参数资料
型号: DS26503
英文描述: T1/E1/J1 BITS Element
中文描述: T1/E1/J1 BITS单元
文件页数: 39/123页
文件大小: 995K
代理商: DS26503
DS26503 T1/E1/J1 BITS Element
39 of 123
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 SR3)
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:
IIR
Register Description:
Interrupt Information Register
Register Address:
13h
Bit #
7
6
5
4
Name
Default
0
0
0
0
HW
Mode
Bit 0/Status Register 1 (SR1).
0 = Status Register 1 interrupt not active.
1 = Status Register 1 interrupt active.
Bit 1/Status Register 2 (SR2).
0 = Status Register 1 interrupt not active.
1 = Status Register 1 interrupt active.
Bit 2/Status Register 3 (SR3).
0 = Status Register 1 interrupt not active.
1 = Status Register 1 interrupt active.
Bit 3/Status Register 4 (SR4).
0 = Status Register 1 interrupt not active.
1 = Status Register 1 interrupt active.
Bit 4/Unused.
Bit 5/Unused.
Bit 6/Unused.
Bit 7/Unused.
3
2
1
0
SR4
0
SR3
0
SR2
0
SR1
0
X
X
X
X
X
X
X
X
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