DS31256 Maxim Integrated Products, DS31256 Datasheet - Page 59
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 6-6. Receive V.54 State Machine
Sync = 0
Sync = 0 or
4 Second Timer
Has Expired
VTO = 1
Search for
Loop Up
Pattern for
32 VCLKs
Reset 4 second timer;
wait for Loss of Sync or
All 1s (64 in a Row)
or for the 4 second
timer to expire
VRST = 1
VLB = 0
VTO = 0
SLBP = 0
Sync = 1
SLBP = 1
VRST (in RP[n]CR)
59 of 183
SYSCLK
All Ones
SLBP = 1
CLK
Data
VLB = 0
Sync = 1
Search for
Loop Down
Pattern
VLB = 1
Sysclk is used only to time
a 4 second timer. It is run into
a 2E27 counter which provides
a 4.03 second time out with a
33MHz clock and a 5.37 second
time out with a 25MHz clock
wait for Loss of Sync or
All 1s (64 in a Row)
All Ones
V.54 State
Machine
v54sm
Sync = 0
Time Out (VTO)
Loopback (VLB);
both in RP[n]CR
Change of
State in Status
(SLBP); in SV54
Sync = 0
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