DS31256 Maxim Integrated Products, DS31256 Datasheet - Page 89
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
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- Download datasheet (2Mb)
Figure 9-2. Receive DMA Memory Organization
Free-Queue Base Address (32)
Free-Queue Large Buffer Host Write Pointer (16)
Free-Queue Large Buffer DMA Read Pointer (16)
Free-Queue Small Buffer Start Address (16)
Free-Queue Small Buffer Host Write Pointer (16)
Free-Queue Small Buffer DMA Read Pointer (16)
Free-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
89 of 183
Contains 32-Bit Addresses for Free Data
Receive Done-Queue Descriptors:
Links to Other Packet Descriptors
Receive Free-Queue Descriptors:
Free-Queue Descriptors Allowed
Up to 64k dwords Done-Queue
Status/Control Information and
Receive Packet Descriptors:
Contains Index Pointers to
Contains 32-Bit Addresses
Used Packet Descriptors
Buffers and their Associated
Main Off-Board Memory
(32-Bit Address Space)
Free Data Buffer Space
Used Data Buffer Space
to Free Buffer as well as
Up to 64k Quad dwords
Free Packet Descriptors
Up to 64k Dual dwords
Descriptors Allowed
Descriptors Allowed
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