![](http://datasheet.mmic.net.cn/330000/PM7366_datasheet_16444405/PM7366_89.png)
RELEASED
DATA SHEET
PM7366 FREEDM-8
ISSUE 4
PMC-1970930
FRAME ENGINE AND DATA LINK MANAGER
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA,INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
76
10
NORMAL MODE REGISTER DESCRIPTION
Normal mode registers are used to configure and monitor the operation of the FREEDM.
Notes on Normal Mode Register Bits:
1. Writing values into unused register bits has no effect. However, to ensure software
compatibility with future, feature-enhanced versions of the product, unused register bits must
be written with logic zero. Reading back unused bits can produce either a logic one or a logic
zero; hence, unused register bits should be masked off by software when read.
2. Except where noted, all configuration bits that can be written into can also be read back. This
allows the processor controlling the FREEDM-8 to determine the programming state of the
block.
3. Writable normal mode register bits are cleared to logic zero upon reset unless otherwise
noted.
4. Writing into read-only normal mode register bit locations does not affect FREEDM-8 operation
unless otherwise noted.
5. Certain register bits are reserved. These bits are associated with megacell functions that are
unused in this application. To ensure that the FREEDM-8 operates as intended, reserved
register bits must only be written with their default values. Similarly, writing to reserved
registers should be avoided.
10.1 PCI Host Accessible Registers
PCI host accessible registers can be accessed by the PCI host. For each register description
below, the hexadecimal register number indicates the PCI offset from the base address in the
FREEDM-8 CBI Register Base Address Register when accesses are made using the PCI Host
Port.
Note
These registers are not byte addressable. Writing to any one of these registers modifies all the
bits in the register. Byte selection using byte enable signals (CBEB[3:0]) are not implemented.
However, when all four byte enables are negated, no access is made to the register.