NEC UPD98413 User Manual page 201

(28) Receive ATM mode register (MDATMR)
The MDATMR register sets the modes related to receive ATM operation.
Register
Name
Port0:
MDATMR 0088 H
31 30 29 28
15 14 13 12
Reserved
Bit Field
D31- Reserved Set to 0.
D10
HECO
D9 Controls the HEC verification of a receive cell.
CSCM
D8 Controls descramble of a cell.
1: Not descramble
D7 LCDDT Changes the LCD detection and termination condition.
1: LCD status is detected if OCD status lasts for 4 ms.
0: LCD status is detected at the same time as OCD detection.
OCDT[1:0]
D6-D5 Changes the number of backward protection stages
status is cleared if the correct HEC has been detected in the receive cell stream
1 times in a row.
OCDD[1:0]
D4-D3 Sets the number of forward protection stages
is placed in the OCD status if it cannot detect the correct HEC in the receive cell
stream
HECCM
D2 Controls 1-bit error correction of a header by HEC verification.
1: Does not correct bit error and drops cell.
0: Corrects bit error and passes cell.
D1-D0 HECDC[1:0] Changes the number of recovery stages
mode" in HEC verification status transition.
CHAPTER 5 REGISTERS
Address
Port1: Port2: Port3:
0488 H 0888 H 0C88 H
27 26 25 24
Reserved
11 10 9 8
HECO CSCM
1: Disabled 0: Enabled
0: Descramble
LCD status is terminated if cell synchronization status lasts for 4ms.
LCD status is terminated at the same time as OCD termination.
11: 8 10: 7
α
times in a row.
11: 9 10: 8
11: Setting prohibited
PRELIMINARY
Access Default
R/W 000000A8 H
23 22 21 20
7 6 5 4
LCDDT OCDT[1:0] OCDD[1:0]
Function
δ
for OCD detection. The OCD
01: 6 00: 5
α
for OCD detection. The
01: 7 00: 6
ε
from "detection mode" to "correction
10: 4 01: 2 00: 1
19 18 17 16
3 2 1 0
HECCM HECDC[1:0]
Default
0
0
0
1
01
δ
+
µ
PD98413 01
0
00
NEC confidential and Proprietary
201