
PM5317 SPECTRA-9953 Telecom Standard Product Data Sheet
Release
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000741, Issue 5
465
Register 2188H: ASSI Control Register
Bit
Type
Function
Default
Bit 15
Unused
Bit 14
Unused
Bit 13
Unused
Bit 12
Unused
Bit 11
Unused
Bit 10
Unused
Bit 9
Unused
Bit 8
Unused
Bit 7
Unused
Bit 6
Unused
Bit 5
Unused
Bit 4
Unused
Bit 3
Unused
Bit 2
Unused
Bit 1
Unused
Bit 0
R/W
IPS
0
The ASSI control register is provided at Read/Write Address 0188H. This register stores the
internal page select (IPS), which is used for the selection of the control page. This internal bit
allows the user to switch the page by changing the value in this register. In fact, either IPS or
DCMP bits can be used independently for the page switching. This is implemented to provide
both software and hardware control over the page selection, depending on the user preference.
IPS
The internal page select (IPS) bit is used in conjunction with the control page select
(DCMP) input to select the active address page used by the ASSI. The IPS bit is XORed
with the DCMP input signal and the logical result determines the page that will be used.
When the result is logic 0, the page 0 is selected and, consequently, when the result is logic
1, the page 1 is selected. Reading this register bit provides the result of the XOR operation,
thus providing the current page selected.