NS7520B-1-I46 Digi International, NS7520B-1-I46 Datasheet - Page 79

• 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

Table 24: System Control register bit definition
D05:04
D03:00
Bits
R/W
N/A
Access
BSYNC
Reserved
Mnemonic
0
N/A
Reset
TA_ input synchronizer
Defines the level of synchronization performed within the
NS7520 for TA_ input:
00
01
10
11
The NS7520 can process the TA_ input signal using a 1-
stage flip-flop synchronizer or a 2-stage synchronizer. A
1- or 2-stage synchronizer must be used when TA_ input
is asynchronous to the BCLK signal.
Note:
N/A
Description
w w w . d i g i e m b e d d e d . c o m
1-stage synchronizer
1-stage synchronizer
2-stage synchronizer
Do not use this setting
The 2-stage synchronizer is preferable, as it
introduces one additional BCLK of latency in
the access cycle.
G E N M o d u l e
6 7