NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 109

• 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

Chip Select Option Register A
Address: FFC0 0014/24/34/44/54
The Chip Select Option Register A defines the physical size of the chip select, as well
as other features. Each chip select can be configured in size from 4 Kbytes to
4 Gbytes.
Table 38: Chip Select Option Register A bit definition
D31:12
D11:08
D07:06
Bits
15
31
30
14
MASK
R/W
R/W
R/W
Access
29
13
28
12
MASK
WAIT[3:0]
BCYC[1:0]
Mnemonic
27
11
26
10
WAIT[3:0]
25
9
0
0 for
CS[4:1],
‘b1111 for
CS0
0
Reset
24
8
MASK
w w w . d i g i e m b e d d e d . c o m
23
BCYC[1:0]
7
Mask Address
Controls the size of the memory peripheral decode
space. Can also be used to “alias” the peripheral
device in different areas of the memory map.
See "Setting the chip select address range" on page
88 for more information.
Memory timing control fields
The WAIT field controls the number of wait states
for all single cycle memory transfers and the first
memory cycle of a burst transaction. The complete
WAIT field is the concatenation of the four WAIT
bits in this register and the two WAIT bits in Chip
Select Option
Register B.
The BCYC field controls the number of clock
cycles for the secondary portion of a burst cycle.
The complete BCYC field is the concatenation of
the two BCYC bits in this register and the two
BCYC bits in the Chip Select Option Register B.
Description
22
6
21
M e m o r y C o n t r o l l e r M o d u l e
5
BSIZE
20
4
19
3
PS
18
2
CTRL_
17
OE
1
CTRL_
WE
16
0
9 7