DS31256 Maxim Integrated Products, DS31256 Datasheet - Page 160

• Manufacturer Part Number: DS31256
• Description: IC CTRLR HDLC 256-CHANNEL 256BGA
• Manufacturer: Maxim Integrated Products

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

Figure 11-10. 8-Bit Write Cycle
Motorola Mode (LIM = 1)
Arbitration Enabled (LARBE = 1)
Bus Transaction Time = 6 LCLK (LRDY = 0110)
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 LBR being asserted. Once LBG 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.
LBGACK
LCLK
LA[19:0]
LD[7:0]
LD[15:8]
LBHE
LR/W
LDS
Note: LA, LD, LBHE, LDS, and LR/W are tri-stated.
LCLK
LBR
LBG
Tri-State
Tri-State
Tri-State
Tri-State
Tri-State
1
Address Valid
Tri-State
Data Valid
2
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3
32 to 1,048,576 LCLKs
4
5
6