DS34S132GNA2+ Maxim Integrated, DS34S132GNA2+ Datasheet - Page 62

• Manufacturer Part Number: DS34S132GNA2+
• Description: Communication ICs - Various 32Port TDM-Over-Pack Transport Device
• Manufacturer: Maxim Integrated

Specifications of DS34S132GNA2+

• Rohs: yes
• Part # Aliases: 90-34S13+2N2

9.3.3.1
A TXP Header Descriptor is programmed for each activated SAT, CES, HDLC and Clock Only Bundle (up to 256).
The TXP Header Descriptors are retrieved from memory as they are needed for each outgoing TXP PW Packet.
Figure 9-25
used to identify the number of bytes included in the transmitted TXP Header and where the TXP Local Timestamp,
Length and FCS fields are located in the header so that the S132 can modify these fields “on-the-fly” when
required. The Header Control field values are not included in the transmitted Ethernet packets.
Figure 9-25. SAT/CES/HDLC/Clock Only PW TXP Header Descriptor
The 256 TXP Header Descriptors are programmed in an SDRAM memory block that begins at address
EMI.BMCR1.TXHSO. The TXP Header Descriptor for each Bundle is stored in a 128-byte SDRAM slot that is
addressed/indexed at the location =
The TXP Header Control for SAT/CES and HDLC PW packets is a 32-bit Dword (depicted in
Table 9-11. TXP SAT/CES/HDLC/Clock Only PW Header Control
The S132 automatically generates TXP SAT/CES/Clock Only packets when sufficient data has been received from
the TDM Port to satisfy the
All SAT/CES/Clock Only Bundles must be assigned at least one Timeslot
B.BCDR3.TXPMS
(Clock Only) or transmitted with payload (normal).
19-4750; Rev 1; 07/11
Field
RSVD
TXELEN [25:21]
TXCWE
TXRE
RSVD
TXALEN [15:11]
TXAOFF [10:6]
TXUDPE [5]
TXIPV6E [4]
TXIPV4E [3]
TXVLTC [2:1]
TXETHF [0]
3
1
3
0
2
9
TXP SAT/CES/HDLC/Clock Only PW Packet Generation
Bit [x:y] Description
[31:26]
[20]
[19]
[18:16]
depicts the format of the data that is programmed in the TXP Header Descriptor. The Header Control is
2
8
2-bytes of Dummy Fill = 0x00.00
2
7
selects whether the packet stream for the TXP Bundle is disabled, transmitted without payload
… DA, SA, optional VLAN Tags, optional LLC/SNAP and Type/Length fields
2
6
Reserved.
TXP Header Length specifies how many Dwords are in the packet header including the
Ethernet, Application, RTP and Control Word Headers (when applicable).
TXP Control Word Exists. 1 = included; 0 = not included.
TXP RTP Exists. 1 = included; 0 = not included.
Reserved.
TXP Application Header Length specifies how many Dwords are included in the
Application Protocol Header beginning just after the Ethernet Header and including the
Control Word and RTP Headers (when applicable).
TXP Application Header Offset = Dword offset of Application Header in Ethernet packet.
TXP UDP Header Exists. 1 = included; 0 = not included.
TXP IPv6 Header Exists. 1 = included; 0 = not included.
TXP IPv4 Header Exists. 1 = included; 0 = not included.
TXP VLAN Tag Count specifies # VLAN tags in the header (valid values = 0, 1 or 2).
TXP Ethernet Header Format. 0 = DIX/Ethernet II format; 1 = IEEE 802.2 LLC/SNAP.
Application Protocol Header (e.g. UDP/IP, L2TPv3/IP, MFA-8, MEF-8)
TXAOFF = (“Application Header starting byte position in Ethernet packet” - 2) ÷ 4
2
5
2
4
B.BCDR1.PMS
2
3
2
2
TXHXSO
Optional RTP and Control Word Headers
2
1
2
0
(effective payload size) and
+ (Bundle Number * 128 bytes).
1
9
Header Control
1
8
1
7
1
6
1
5
1
4
1
3
B.BCDR3.TXBTS (payload
Ethernet Header including …
1
2
1
1
1
0
(B.BCDR2.ATSS
9 8 7 6 5 4 3 2 1 0
DS34S132 DATA SHEET
Table
9-11.
and TSAn.m).
type) settings.
62 of 194