NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 113

• 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 B
Address: FFC0 0018/28/38/48/58
Table 39: Chip Select Option Register B bit definition
D31:06
D05:04
D03:02
Bits
15
31
30
14
N/A
R/W
R/W
Access
29
13
28
12
Reserved
WAIT[5:4]
BCYC[3:2]
Mnemonic
27
11
Reserved
26
10
25
9
N/A
0 for
CS[4:1],
’b11 for
CS0
0
Reset
24
8
Reserved
w w w . d i g i e m b e d d e d . c o m
23
7
N/A
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 Chip Select Option Register A
and the two WAIT bits in this register.
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 Chip Select Option
Register A and the two BCYC bits in this
register.
For OE- or WE-controlled cycles, an additional
BCLK cycle is added to each memory cycle.
For information about related DRSEL and
DMODE settings, see the Chip Select Option
Register A bit definition table (on page 97).
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
WAIT[5:4]
5
20
4
19
BCYC[3:2]
3
18
2
17
1
SYNC
16
0
1 0 1