NS7520B-1-I46 Digi International, NS7520B-1-I46 Datasheet - Page 72

• 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

6 0
N S 7 5 2 0 b o o t s t r a p i n i t i a l i z a t i o n
Note:
ADDR[27]
ADDR[26]
ADDR[24:23]
ADDR[19:09]
ADDR[8:7]
ADDR[6:5]
ADDR[4:0]
Address bit
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
The initial operating bus speed must be selected by adding pulldown to
the address lines that preset the ND value (ADDR[4:0]).
Endian configuration
CPU bootstrap
CS0/MMCR[19:18] setting
GEN_ID setting
PLL IS setting
PLL FS setting
PLL ND setting
Name
0
1
0
1
00
01
10
11
GEN_ID=A[19:09], Default=
IS=A[8:7]
FS=A[6:5]
ND=A[4:0]
Description
Little Endian configuration
Big Endian configuration
CPU disabled; GEN_BUSER=1
CPU enabled; GEN_BUSER=0
8-bit SRAM, 63 wait-states/b00
32-bit SRAM, 63 wait-states/b01
32-bit SRAM
16-bit SRAM, 63 wait-states/b11
,
,
Default=
,
Default=
Default=
’b10
’b00
’b01011
’h3ff