Silicon Errata for the MSC8101 Processor, Mask 0K40A, Rev. 5

16

Freescale Semiconductor

CPM40

Corruption in AAL0 IDLE Cell

Date Added: 5/30/2000

There is a rare case when transmitting an ATM idle cell that the idle cell may be

corrupted. This can occur in certain internal sequences of events that cannot be controlled

or detected by the user.

Place the Idle Base template at address 64 byte align minus 4. For example use

Idle_BASE = 0x2cfc not 0x2d00.

4648b

Rev A

0K40A

CPM41

Limitation in ATM Controller

Date Added: 5/30/2000

There are some limitations in the ATM controller. The first limitation is that only the

first 8 PM tables can be used instead of 64. When using these 8 tables, the user must clear

the 5 most significant bits of TBD_BASE (in case of Tx PM) or RBD_BASE (in case of

Rx PM). The second limitation is that only the first 2048 ATM channel numbers can be

used.

There is a microcode patch that can fix the PM limitation. The ATM channel number

limitation has no workaround.

4744

Rev A

0K40A

CPM42

Data Corruption in MCC

Date Added: 5/30/2000

Description: Data corruption may occur in the receive buffers of MCC channels when more then

one TDM slot uses 7 bits of contiguous data.

Workaround: It is possible to avoid this problem by splitting the 7 bits slots between two SI ram

entries such that one entry will represent 4 bits of the slot and the other SI entry will represent 3

bits of the slot. The errata occurs only when all the 7 bits are represented by one entry in the SI

ram.

System Number: 4743

Fix Plan: Rev A

0K40A

CPM43

TxCLAV Ignored By UTOPIA in Single PHY Mode

Date Added: 5/30/2000

Description: When the FCC transmitter is configured to work in UTOPIA single PHY master

mode, it ignores negation of the TxCLAV signal. Therefore, the UTOPIA slave cannot control the

flow of cells by negating TxCLAV. Note that this bug affects Rev A.1 chips only.

Workaround: Configure the FCC to work in multi-master mode but limit the number of PHYs

to 1 by programming: FPSMR[LAST PHY] = 5’b0

System Number: 4882

Fix Plan: Rev A

0K40A

Table 2. Silicon Errata (Continued)

Errata

Number

Errata Description

Applies

to Mask