CHAPTER 5 REGISTERS
PRELIMINARY
NEC confidential and Proprietary
192
(22) Receive SOH mode register (MDSOHR)
The MDSOHR register sets the modes related to receive SOH operation.
Address
Register
Name
Port0: Port1: Port2: Port3:
Access Default
MDSOHR
0070 H
0470 H
0870 H
0C70 H
R/W
00007D40 H
31 30 29 28 27
26 25 24 23 22 21 20 19
18 17 16
Reserved
15 14 13 12 11
10 9 8 7 6 5 4 3 2 1 0
FSCM
J0MSG STIUT STIUD STIMDT LOFDT
OOFT[1:0]
OOFD[1:0]
J0SYNC J0SZ
B1M LOST Res
CDO
Bit Field
Function
Default
D31-
D16
Reserved
Set to 0.
0
D15
FSCM
Controls descramble of a frame.
1: Not descramble
0: Descramble
0
D14
J0MSG
Changes "n" of the received trace message drop condition.
1: n = 5
0: n = 3
1
D13
STIUT
Changes "n" of the Section TIU termination condition.
1: n = 5
0: n = 3
1
D12
STIUD
Changes "n" of the Section TIU detection condition.
1: n = 8
0: n = 5
1
D11
STIMDT
Changes "n" of the Section TIM detection/termination condition.
1: n = 5
0: n = 3
1
D10
LOFDT
Changes the LOF detection/termination condition.
1: LOF status is detected if OOF status lasts for 3 ms.
LOF status is terminated if the
µ
PD98413 is not in the OOF status for 3ms.
0: LOF status is detected at the same time as OOF detection.
LOF status is terminated at the same time as OOF termination.
1
D9-D8
OOFT[1:0]
Changes the number of backward protection stages
δ
for OOF detection. The OOF
status is cleared if the frame synchronization pattern has been detected in the
receive cell stream
δ
times in a row.
11: 4
10: 3
01: 2
00: Reserved
01
D7-D6
OOFD[1:0]
Changes the number of forward protection stages
α
for OOF detection. The
µ
PD98413 is placed in the OOF status if it cannot detect a frame synchronization
pattern in the receive data stream
α
times in a row.
11: 6
10: 5
01: 4
00: 3
01
D5
J0SYNC
Specifies whether the first pattern of a message or end pattern is selected as a
synchronization pattern when the J0 section trace message is received.
1: Selects the first word of the message as a synchronization pattern.
0: Selects the last word of the message as a synchronization pattern.
0
D4
J0SZ
Selects the size of the receive J0 section trace message.
1: 16 bytes
0: 64 bytes
0
D3
B1M
Selects even or odd parity for BIP-8 (B1) parity operation of receive section.
1: Odd parity
0: Even parity
0
Содержание UPD98413
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