cx28500 Mindspeed Technologies, cx28500 Datasheet - Page 122

• Manufacturer Part Number: cx28500
• Description: Cx28500 Multichannel Synchronous Communications Controller
• Manufacturer: Mindspeed Technologies

Table 6-36.
28500-DSH-002-C
0
FOOTNOTE:
(1)
Bit
It is not allowed to change configuration of the port while the port is enabled. Therefore, it is not allowed to disable the port and change
configuation in the same operation. It is also not allowed to change configuation and enable the port in the same operation. Both actions
need to be split to 2 separate operations. If the port is active one must first clear the TXENBL bit, and only then write new configuration.
If the port is inactive, one must first write new configuration with the TXENBL bit cleared and then re-write the register with the same
configuration but with the TXENBL bit set.
Field Name
TCOFAIEN
TSIU Port Configuration Register (3 of 3)
NOTE:
Value
For polling to work properly and efficiently, it is mandatory that the FIRST (receive time
slot)/LAST (transmit time slot) indications be configured for each channel regardless of the
operational mode (i.e., HDLC, transparent, etc.). The polling mechanism in the CX28500
uses these markings as triggering points. When configured correctly, CX28500 polls on a
channel once at the selected poll throttle rate instead of polling at every time slot allocated
to that channel, as in the case of hyperchannels. When a channel consists of only one time
slot, as in a DS0 channel, its corresponding receive time slot should have the FIRST_TS bit
set. Likewise, its corresponding transmit time slot should have the LAST_TS bit set.
0
1
Change of Frame Alignment/Recovery from Change Of Frame Alignment Interrupts Disabled.
Change Of Frame Alignment/Recovery from Change Of Frame Alignment Interrupts Enabled. If COFA is
detected, generates an interrupt indicating COFA. When COFA is recovered from, generates a Recovery
From COFA Interrupt indication.
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Description
Memory Organization
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