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DS31256 Datasheet(PDF) 156 Page - Maxim Integrated Products

Part # DS31256
Description  256-Channel, High-Throughput HDLC Controller
PDF  183 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

DS31256 Datasheet(HTML) 156 Page - Maxim Integrated Products

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DS31256 256-Channel, High-Throughput HDLC Controller
156 of 183
Figure 11-6. 16-Bit Write Cycle
Intel Mode (LIM = 0)
Arbitration Enabled (LARBE = 1)
Bus Transaction Time = 4 LCLK (LRDY = 0100)
An attempted access by the host causes the local bus to request the bus. If bus access has not been granted
(
LBGACK deasserted), the timing shown at the top of the page occurs, with LHOLD being asserted. Once
LHLDA is detected, the local bus grabs the bus for 32 to 1,048,576 clocks and then releases it. If the bus has
already been granted (
LBGACK asserted), the timing shown at the bottom of the page applies.
LCLK
LHOLD
LHLDA
LBGACK
32 to 1,048,576 LCLKs
LA[19:0]
LD[7:0]
LD[15:8]
LRD
LWR
Address Valid
LBHE
Data Valid
Data Valid
Tri-State
Tri-State
Tri-State
Tri-State
Tri-State
Tri-State
LCLK
1234
Note: LA, LD,
LBHE, LWR, and LRD are tri-stated.



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