DS31256 Maxim Integrated Products, DS31256 Datasheet - Page 88
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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Figure 9-1. Receive DMA Operation
00h
08h
10h
00h
04h
08h
0Ch
EOF Status
EOF Status
EOF Status
EOF Status
unused
unused
unused
Free Queue Descriptors
Done Queue Descriptors
Free Data Buffer Address
Free Data Buffer Address
Free Data Buffer Address
(circular queue)
(circular queue)
CH #5
CH #2
CH #9
CH #
Free Desc. Ptr.
Free Desc. Ptr.
Free Desc. Ptr.
dmarbd
Desc. Ptr.
Desc. Ptr.
Desc. Ptr.
Desc. Ptr.
Status
Status # Bytes Next Desc. Ptr.
Status # Bytes Next Desc. Ptr.
Status # Bytes Next Desc. Ptr.
Status # Bytes Next Desc. Ptr.
Open Descriptor Space
Available for Use by the DMA
Open Descriptor Space
Available for Use by the DMA
88 of 183
Timestamp
Timestamp
Timestamp
Timestamp
Timestamp
Data Buffer Address
Data Buffer Address
Data Buffer Address
Data Buffer Address
Data Buffer Address
# Bytes Next Desc. Ptr.
Unused
Free Packet Descriptors & Data Buffers
Used Packet Descriptors & Data Buffers
CH #5
CH #2
CH #2
CH #9
CH #2
Free Data Buffer
(up to 8188 bytes)
Free Data Buffer
(up to 8188 bytes)
First Filled
Data Buffer
for Channel 2
Single Filled
Data Buffer
for Channel 5
Second Filled
Data Buffer
for Channel 2
Last Filled
Data Buffer
for Channel 2
Single Filled
Data Buffer
for Channel 9
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