DS3104GN Maxim Integrated Products, DS3104GN Datasheet - Page 116
DS3104GN
Manufacturer Part Number
DS3104GN
Description
Timers & Support Products SDH-SONET-Synchronou s Ethernet Line Card
Manufacturer
Maxim Integrated Products
Datasheet
1.DS3104GN.pdf
(136 pages)
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Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 3: INTREQ Pin Mode (LOS). When GPO = 0, this bit selects the function of the INTREQ pin.
Bit 2: INTREQ Pin General-Purpose Output Enable (GPO). When set to 1, this bit configures the interrupt
request pin to be a general-purpose output whose value is set by the POL bit.
Bit 1: INTREQ Pin Open-Drain Enable (OD)
Bit 0: INTREQ Pin Polarity (POL)
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 7 to 0: Protection Control (PROT[7:0]). This field can be used to protect the rest of the register set from
inadvertent writes. In protected mode writes to all other registers are ignored. In single unprotected mode, one
register (other than PROT) can be written, but after that write the device reverts to protected mode (and the value
of PROT is internally changed to 00h). In fully unprotected mode all register can be written without limitation. See
Section 7.2.
19-4627; Rev 7; 8/10
________________________________________________________________________________________ DS3104-SE
1000 0101 = Fully unprotected mode
1000 0110 = Single unprotected mode
All other values = Protected mode
0 = The INTREQ/LOS pin indicates interrupt requests
1 = The INTREQ/LOS pin indicates the real-time state of the selected reference activity monitor (see
0 = INTREQ is function determined by the LOS bit.
1 = INTREQ is a general-purpose output.
When GPO = 0:
When GPO = 1:
When GPO = 0:
When GPO = 1:
0 = INTREQ is driven in both inactive and active states.
1 = INTREQ is driven high or low in the active state but is high impedance in the inactive state.
0 = INTREQ is driven as specified by POL.
1 = INTREQ is high impedance and POL has no effect.
0 = INTREQ goes low to signal an interrupt request or LOS = 1 (active low).
1 = INTREQ goes high to signal interrupt request or LOS = 1 (active high).
0 = INTREQ driven low.
1 = INTREQ driven high.
Section 7.5.3). This function is most useful when external switching mode (Section 7.6.5) is enabled
(MCR10:EXTSW = 1).
—
7
0
7
1
—
6
0
6
0
INTCR
Interrupt Configuration Register
7Dh
PROT
Protection Register
7Eh
—
5
0
5
0
—
4
0
4
0
PROT[7:0]
LOS
3
0
3
0
GPO
2
0
2
1
OD
1
1
1
0
116 of 136
POL
0
0
0
1
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