NS7520B-1-I46 Digi International, NS7520B-1-I46 Datasheet - Page 128

• 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

SDRAM A10/AP support
1 1 6
S D R A M
Table 44: x8 SDRAM interconnect
The SDRAM A10/AP signal multiplexes one of the RAS signals with an auto-precharge
command indicator. During the active command, the A10/AP signal must provide the
DRAM A10 logical RAS address value. During the read and write commands, the AP
signal provides the auto-precharge command indicator. The NS7520 drives 0 during
read and write commands. During the precharge command, the A10/AP signal
indicates whether all banks should be precharged. The NS7520 always causes all
banks to be precharged.
A3
A4
A5
A6
A7
A8
A9
A10
A11
A13
A19
A20
A21
BCLK
VCC
D31-D16
NS7520 signal
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
A3
A4
A5
A6
A7
A8
A9
BA
CLK
CKE
D15-00
16M SDRAM signal
A3
A4
A5
A6
A7
A8
A9
A11
BA0
BA1
CLK
CKE
D15-00
64M SDRAM signal