DS31256 Maxim Integrated Products, DS31256 Datasheet - Page 154

• 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

Bit 6/Local Bus Width (LBW)
Bits 8 to 11/Local Bus Arbitration Timer Setting (LAT0 to LAT3). These four bits determine the total time the
local bus seizes the bus when it has been granted in the arbitration mode (LARBE = 1). This period is measured
from LHLDA (LBG) being detected to LBGACK inactive.
0000 = when granted, hold the bus for 32 LCLKs
0001 = when granted, hold the bus for 64 LCLKs
0010 = when granted, hold the bus for 128 LCLKs
0011 = when granted, hold the bus for 256 LCLKs
0100 = when granted, hold the bus for 512 LCLKs
1101 = when granted, hold the bus for 262,144 LCLKs
1110 = when granted, hold the bus for 524,288 LCLKs
1111 = when granted, hold the bus for 1,048,576 LCLKs
0 = 16 bits
1 = 8 bits
CONDITION
154 of 183
33MHz PCLK
15.9ms
31.8ms
0.97µs
15.5µs
7.9ms
1.9µs
3.9µs
7.8µs
25MHz PCLK
10.5ms
21.0ms
41.9ms
10.2µs
20.5µs
1.3µs
2.6µs
5.1µs