DS31256 Maxim Integrated Products, DS31256 Datasheet - Page 46

• 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 6-1. Layer 1 Block Diagram
RC
RS
RD
TC
TS
TD
Force
All
Ones
1 of 16
Ports
0, 1, 2
Only
LLB
Local
Loop-
Back
(LLB)
Invert
Clock /
Data /
Sync
BERT/
Fast
HDLC
Mux
Invert
Clock /
Data /
Sync
Over-
Sample
with
PCLK
Over-
Sample
with
PCLK
UNLB
(Figure 6-7)
BERT Mux
Un-
Channel-
ized
Network
Loopback
(UNLB)
46 of 183
PORT
RAM
(see
Sec.
5.3)
V.54
Detector
Channel-
ized
Local
Loop-
Back
(CLLB)
Layer 1
State Machine
Transmit
Receive
Channel-
ized
Network
Loop-
Back
(CNLB)
Ports 0 & 1 Only
SLOW
HDLC
(One
per
Port)
FAST
HDLC
l1_bd
To /
From
FIFO
Block