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

Freescale Semiconductor

17

CPM44

Zero Insertion Error on MCC

Date Added: 5/30/2000

Description: When the MCC transmitter is used in HDLC super channel mode, a zero insertion

at the last bit before the flag fails to occur.

Workaround: There is a microcode patch which fixes the problem.

System Number: 4941

Fix Plan: Rev A

0K40A

CPM45

Error in CLAV Sample Point

Date Added: 5/30/2000

Description: In FCC ATM transmit master mode (multiple PHY only), the CLAV signal is sam-

pled 5 clocks before the end of the cell instead of 4 clocks. This is relevant only for back-to-back

transmission sequence.

Workaround: In multiple PHY fix priority polling mode, by adding a dummy PHY, it is possible

to ensure that the dummy PHY is polled at payload 44 (5 clocks before the end of the cell). This

is possible since the cell length is constant and the number of PHY to poll is also constant.

System Number: 5031

Fix Plan: Rev A

0K40A

CPM46

Error in Internal Prioritization of CPM Resource

Date Added: 5/30/2000

Description: Each of the communication controllers (FCC, MCC, SCC, ...) issues request for

service to the CPM with different priorities in order to receive the necessary assistance in time.

Because of an internal connection error, the FCC3 request for service is issued with a much lower

priority than intended. Because of this, FCC3 may sporadically overrun when the CPM is heavily

loaded.

Workaround: None

System Number: 5663

Fix Plan: Rev A

0K40A

CPM48

Error in TDM

Date Added: 5/30/2000

Description: Disabling TDMx may interfere with the operation of TDMy if TDMy uses the SI-

RAM blocks directly above those used by TDMx. For example:

start address of TDMc = 0

start address of TDMb = 2

start address of TDMd = 4

when disabling TDMd, TDMb is affected.

when disabling TDMb, TDMc is affected.

when disabling TDMc, No TDM is affected.

Workaround: Instead of disabling a TDM, the user can switch to a shadow RAM that contains

only non supported slots in its entries.

System Number: 5714

Fix Plan: Rev A

0K40A

Table 2. Silicon Errata (Continued)

Errata

Number

Errata Description

Applies

to Mask