DS31256 Maxim Integrated Products, DS31256 Datasheet - Page 155
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: 155 of 183
- Download datasheet (2Mb)
11.3 Examples of Bus Timing for Local Bus PCI Bridge Mode Operation
Figure 11-5. 8-Bit Read 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 applies, 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
LCLK
LA[19:0]
LD[7:0]
LD[15:8]
LBHE
LWR
LRD
Note: LA, LD, LBHE, LWR, and LRD are tri-stated.
Tri-state
Tri-State
Tri-State
Tri-State
155 of 183
1
Address Valid
2
32 to 1,048,576 LCLKs
3
4
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