PM5347S Datasheet, PDF (196/302 Pages) PMC-Sierra, Inc – SATURN USER NETWORK INTERFACE PLUS

PM5347 S/UNI-PLUS
DATA SHEET
PMC-941033
ISSUE 6
SATURN USER NETWORK INTERFACE PLUS
Register 0x5C: RACP GFC Control and Miscellaneous Control
Bit
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Type
R/W
R/W
R/W
R/W
R/W
R/W
Function
CDDIS
RXBYTEPRTY
Unused
Unused
RGFCE[3]
RGFCE[2]
RGFCE[1]
RGFCE[0]
Default
0
0
X
X
1
1
1
1
RGFCE[3:0]:
The RGFCE[3:0] bits are used to enable the GFC[3:0] bits serialized on
output RGFC. For example, when RGFCE[3] is a logic one, the GFC[3] bit is
output on RGFC. When RGFCE[3] is a logic zero, the GFC[3] bit is not output
on RGFC.
RXBYTEPRTY:
The receive byte parity, RXBYTEPRTY, mode bit selects between byte and
word parity mode for outputs RXPRTY[1:0]. When the RXBYTEPRTY bit is
set to logic one, byte parity mode is selected; otherwise, word parity mode is
selected. In byte parity mode, RXPRTY[1] is the parity bit for outputs
RDAT[15:8], and RXPRTY[0] is the parity bit for outputs RDAT[7:0]. In word
parity mode, RXPRTY[1] is the parity bit for outputs RDAT[15:0], and
RXPRTY[0] is held low. Word parity mode can only be selected when the
BUS8 input is low (i.e., the 16-bit FIFO interface is selected).
CDDIS:
The cell delineation disable bit, CDDIS, is used to defeat the cell delineation
function. When the CDDIS bit is set to logic one, HCS errors are ignored,
which makes every byte appear like a valid cell boundary. Ignoring HCS
errors causes the cell delineation state machine to lock onto an arbitrary cell
boundary and to enter and remain in the SYNC state. Once in the SYNC
state, the incoming data is written to the FIFO.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 180