PCI_PCIe User Guide_RevA.pdf - Symmetricom

1.4. Device Registers
TFP Device Register Summary
Offset Type Reset Label Description
0x00 A See Note TIMEREQ Time Request (TIME0-1)
0x04 A See Note EVENTREQ Event Request (EVENT0-1)
0x08 A See Note UNLOCK1 Release Lockout Event1
0x0C A See Note UNLOCK2 Release Lockout Event2
0x10 R/W 0 CONTROL Control Register
0x14 R/W See Note ACK Acknowledge Register
0x18 R/W 0 MASK Interrupt Mask
0x1C R/W 0 INTSTAT Interrupt Status
0x20 R/W See Note MINSTRB Minor Strobe Time
0x24 R/W See Note MAJSTRB Major Strobe Time
0x28 R See Note EVENT2_0 Minor Event2 Register
0x2C R See Note EVENT2_1 Major Event2 Register
0x30 R See Note TIME0 Minor Time Holding Register
0x34 R See Note TIME1 Major Time Holding Register
0x38 R See Note EVENT0 Minor Event1 Register
0x3C R See Note EVENT1 Major Event1 Register
0x40 Reserved
0x44 A See Note UNLOCK3 Release Lockout Event3
0x48 R See Note EVENT3_0 Minor Event3 Register
0x4C R See Note EVENT3_1 Major Event3 Register
Note:Register contents are undefined at reset.
TIMEREQ Register (0x00)
Accessing this register (with a read or write operation) latches the current time and timing status in
the TIME0 - TIME1 registers. The data value transferred is meaningless.
EVENTREQ Register (0x04)
Accessing this register (with a read or write operation) latches the current time and timing status in
the EVENT0 - EVENT1 registers. The data value transferred is meaningless. Accessing the
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