![](http://datasheet.mmic.net.cn/330000/PM73122_datasheet_16444367/PM73122_84.png)
RELEASED
PM73122 AAL1GATOR-32
DATASHEET
PMC-1981419
ISSUE 7
32 LINK CES/DBCES AAL1 SAR PROCESSOR
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
59
11
FUNCTIONAL DESCRIPTION
The AAL1gator-32 is divided into the following major blocks, all of which are
explained in this section:
UTOPIA Interface Block (UTOPIAI)
AAL1 SAR Processing Block (A1SP)
Processor Interface Block (PROCI)
RAM Interface Block (RAMI)
Line Interface Block (LINEI)
JTAG
11.1 UTOPIA Interface Block (UI)
The UI manages and responds to all control signals on the UTOPIA bus and
passes cells to and from the UTOPIA bus and the two Dual A1SP blocks. Both
8-bit and 16-bit UTOPIA interfaces with an optional single parity bit are
supported. Each direction can be configured independently and has its own
address configuration register.
The following UTOPIA modes are supported.
UTOPIA Level One Master (8-bit only)
UTOPIA Level One PHY
UTOPIA Level Two PHY
Any-PHY PHY
In the sink direction, the UI uses a 8-cell deep FIFO for buffering cells as they
wait to be sent to the Dual A1SP blocks. In addition, each Dual A1SP contains
two 8-cell deep FIFOs (one per A1SP) with separate interfaces to allow each
A1SP to process data at its own pace. In the source direction, the UI uses a 4-
cell deep FIFOs for holding cells before they are sent out onto the UTOPIA bus.
Also, each Dual A1SP contains two 8-cell deep FIFOs (one per A1SP), again
with separate interfaces. The data flow showing the FIFOs is shown in Figure 5.