NS7520B-1-I46 Digi International, NS7520B-1-I46 Datasheet - Page 137
NS7520B-1-I46
Manufacturer Part Number
NS7520B-1-I46
Description
IC ARM MICROPROCESSOR 177BGA
Manufacturer
Digi International
Series
NET+ARM®r
Specifications of NS7520B-1-I46
Applications
Network Processor
Core Processor
ARM7
Program Memory Type
External Program Memory
Controller Series
-
Ram Size
External
Interface
EBI/EMI, Ethernet, DMA, SPI, UART
Number Of I /o
16
Voltage - Supply
1.4 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
177-LFBGA
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
NS7520B-1-I46
Manufacturer:
Digi International
Quantity:
10 000
Part Number:
NS7520B-1-I46
Manufacturer:
NETARM
Quantity:
20 000
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The memory controller does a normal access to address
determine access timing. The memory controller then follows with 3 burst beats to
address offsets
The memory peripheral properly delivers the data at address offset
peripheral, however, has trouble providing the value at
with the BCYC burst timing and the memory peripheral needs an access cycle using
the WAIT timing, as the access address has crossed the memory peripheral’s page
boundary.
If a memory peripheral has a page size less than 64 bytes, then, the memory
peripheral can interface only with the NS7520, using burst cycles, when both the
WAIT and BCYC fields result in the same number of clock cycles for normal and burst
cycles.
You can use one of these combination:
WAIT
0
1
2
’h10
BCYC
1
2
3
,
’h14
, and
’h18
using the BCYC field to determine the access timing.
w w w . d i g i e m b e d d e d . c o m
M e m o r y C o n t r o l l e r M o d u l e
’h10
’hC
. The NS7520 is operating
using the WAIT field to
’hC
. The
1 2 5
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