PM5381-BI PMC-Sierra, Inc., PM5381-BI Datasheet - Page 67

• Manufacturer Part Number: PM5381-BI
• Description: ATM UNI, Single Channel ATM PHY Interface for 2488.32Mbps
• Manufacturer: PMC-Sierra, Inc.

9.7
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2000489, Issue 4
Microprocessor Interface Signals (37)
Pin Name
APSOFP
Pin Name
CSB
RDB
WRB
D[15]
D[14]
D[13]
D[12]
D[11]
D[10]
D[9]
D[8]
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
A[13]/TRS
Type
Output
Type
Input
Input
Input
I/O
Input
Pin
No.
P1
Pin
No.
F4
D2
C1
N1P4N
2M1M2
N4L1M
3L2K1
M4K2J
1K3J2
H1
K4
Function
The APS output frame pulse signal (APSOFP) provides
system timing of the APS output serial interface. APSOFP is
set high once every 9720 APSIFPCLK cycles, or multiple
thereof, to indicate the approximate location of the J0 frame
boundary 8B/10B character on the differential LVDS bus
(APSO_P/ APSO_N[4:1]).
This signal must not be used as a source for APSIFP.
APSOFP is updated on the rising edge of APSIFPCLK.
Function
The active low chip select (CSB) signal is low during S/UNI-
2488 register accesses.
Note that when not being used, CSB must be tied low. If CSB
is not required (i.e. register accesses controlled using the
RDB and WRB signals only), CSB must be connected to an
inverted version of the RSTB input.
The active low read enable (RDB) signal is low during
S/UNI-2488 register read accesses. The S/UNI-2488 drives
the D[15:0] bus with the contents of the addressed register
while RDB and CSB are low.
The active low write strobe (WRB) signal is low during
S/UNI-2488 register write accesses. The D[15:0] bus contents
are clocked into the addressed register on the rising WRB
edge while CSB is low.
The bi-directional data bus, D[15:0], is used during
S/UNI-2488 read and write accesses.
The test register select signal (TRS) selects between normal
and test mode register accesses. TRS is high during test
mode register accesses, and is low during normal mode
register accesses. TRS may be tied low.
S/UNI-2488 Telecom Standard Product Datasheet
Released
67