NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 80

• Manufacturer Part Number: NS7520B-1-C36
• Description: IC ARM MICROPROCESSOR 177BGA
• Manufacturer: Digi International
• Series: NET+ARM®r

Specifications of NS7520B-1-C36

• 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

System Status register
6 8
G E N m o d u l e r e g i s t e r s
Address: FFB0 0004
All bits in the System Status register, except EXT, WDOG, PLL, and SOFT, are loaded
during a hardware reset only. EXT, WDOG, PLL, and SOFT are loaded during any
reset. The GEN_ID value is not affected when an external jumper is changed, unless a
hardware reset is executed first.
Register bit assignment
Table 25: System Status register bit definition
D31:24
D23
Bits
15
31
30
14
R/O
R/C
Access
N S 7 5 2 0 H a r d w a r e R e f e r e n c e , R e v G 9 / 2 0 0 7
Reserved
29
13
28
12
REV
EXT
Mnemonic
REV
27
11
26
10
‘h29
N/A
Reset
25
9
24
8
NS7520 revision ID
Provides hardware identification of the NS7520 and its
revision.
Current NS7520 device and revision ID is:
Last reset caused by external reset
When set to 1, indicates that the RESET_ pin triggered the
last hardware reset condition. This reset initializes internal
parameters as described in "NS7520 bootstrap
initialization" on page 59.
EXT is set/reset during every reset condition. Clear this bit
by writing
Description
EXT
23
REV field:
7
WDOG
‘hF
22
6
in bits 23:20.
‘h29
GEN_ID
PLL
21
5
SOFT
20
4
19
3
18
2
Reserved
17
1
16
0