MK50H27(1997) 데이터 시트보기 (PDF) - STMicroelectronics
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MK50H27 Datasheet PDF : 56 Pages
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07
PLOST
06
PAV
05:00
PPRIM
0
1
2
3
4
5
8
9
10
11
‘ 12
13
16
17
18
19
20
21
MK50H27
sion of SIOS can be resumed by issuing UPRIM 16 described above.
Valid only in Out Of Service phase when JSS7E=1 (CSR2).
PROVIDER PRIMITIVE LOST is set by MK50H27 when a provider
primitive cannot be issued because the PAV bit is still set from the pre-
vious provider primitive. PLOST is cleared when PAV is cleared and
by a Bus RESET. Writing to this bit has no affect.
PROVIDER PRIMITIVE AVAILABLE is set by the MK50H27 when a
new provider primitive has been placed in PPRIM. PPRIM is
READ/CLEAR ONLY and is set by the chip and cleared by writing a ”1”
to the bit or by Bus RESET. Under normal operation the host should
clear the PAV bit after PPRIM is read.
PROVIDER PRIMITIVE is written by the MK50H27, in conjunction
with setting the PAV bit, to inform the user of link control condi-
tions. Valid Provider Primitives are as follows:
Init Confirmation: indicates that the initialization has completed.
In Service: indicates that alignment has completed successfully.
In Service Yellow: indicates alignment completed succesfully with CCITT
Yellow Book definitions for SINs & SIEs (SF = 9 & 10 respectively).
This primitive will occur only if enabled by RYEL=1 in Protocol Options.
Transmit Clock Watchdog Timer Expired: indicates that the watchdog
timer for TCLK has expired due to no transition on TCLK for more than
the number of SYSCLK cycles as selected by CSR4<15:14>.
Receive Clock Watchdog Timer Expired: indicates that the watchdog
timer for RCLK has expired due to no transition on RCLK for more than
the number of SYSCLK cycles as selected by CSR4<13:12>.
Received SU Timer timeout: indicates that no signal units have been
received within the previous 32xTP time (where TP is the poll timer).
This primitive is only issued if RSUTE=1 (CSR2<12>).
Alignment Out of Service: indicates that a transfer to Out of Service
phase has occured, due to an alignment failure. Alignment will fail if
AERM is exceeded, timer T2 times out, or timer T3 times out.
LSSU Out of Service: indicates that a transfer to the Out of Service
phase has occured, due to a received LSSU.
T1 Out of Service: indicates that a transfer to the Out of Service
phase has occured, due to a timer T1 time out.
Transmit Out of Service: indicates that a transfer to the Out of
Service phase has occured, due to a transmit link failure. The trans-
mit link will fail if timers T6 or T7 time out.
Receive Out of Service: indicates that a transfer to the Out of Service
phase has occured due to receive link failure. A receive link failure will
occur when more than 2 out of 3 signal units have a FIB or BSN error.
SUERM Out of Service: indicates that a transfer to the Out of Service
phase has occured, due to SUERM being exceeded.
Remote Processor Outage: indicates that a SIPO has been received
indicating that a remote processor outage condition has occured.
Remote Processor Outage Recovered: an FISU or an MSU has been
received since remote processor outage condition has been reported.
Received message BSNT: indicates that the MK50H27 has written the
BSNT to the Status Buffer as requested by UPRIM 12.
Retrieval complete: retrieval request and FSNC completed successfully.
The pointer to the retransmission buffer is available in STATUS buffer.
Remote Processor Busy: an SIB has been received indicating that
the remote node has entered into congestion.
Remote Processor Busy Recovered: the remote node has acknowledged
19/56
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