DS31256 Maxim Integrated Products, DS31256 Datasheet - Page 109
![IC CTRLR HDLC 256-CHANNEL 256BGA](/photos/6/82/68222/406-256-bga_sml.jpg)
DS31256
Manufacturer Part Number
DS31256
Description
IC CTRLR HDLC 256-CHANNEL 256BGA
Manufacturer
Maxim Integrated Products
Datasheet
1.DS31256.pdf
(183 pages)
Specifications of DS31256
Controller Type
HDLC Controller
Interface
Serial
Voltage - Supply
3 V ~ 3.6 V
Current - Supply
500mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
256-BGA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DS31256
Manufacturer:
DALLAS
Quantity:
20 000
- Current page: 109 of 183
- Download datasheet (2Mb)
Figure 9-11. Transmit DMA Memory Organization
Pending-Queue Base Address (32)
Pending-Queue Host Write Pointer (16)
Pending-Queue DMA Read Pointer (16)
Pending-Queue End Address (16)
Done-Queue Base Address (32)
Done-Queue DMA Write Pointer (16)
Done-Queue Host Read Pointer (16)
Done-Queue End Address (16)
Descriptor Base Address (32)
Internal Registers
109 of 183
Descriptors of Queued Data Buffers that
Information and Links to Other Packet
Transmit Pending-Queue Descriptors:
Descriptors of Data Buffers that have
Transmit Done-Queue Descriptors:
Contains 32-Bit Addresses to Data
Contains Index Pointers to Packet
Done-Queue Descriptors Allowed
Contains Index Pointers to Packet
Buffers as well as Status/Control
Free-Queue Descriptors Allowed
Transmit Packet Descriptors:
are Ready to be Transmitted
Main Offboard Memory
(32-Bit Address Space)
Free Data Buffer Space
Used Data Buffer Space
Up to 64k quad dwords
Descriptors Allowed
been Transmitted
Up to 64k dwords
Up to 64k dwords
Descriptors
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