NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 259

• 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

Table 90: Serial Channel Bit-Rate register bit definition
Max baudrates with different clock sources
Max baud rates for the serial port depend on the clock source you are using.
With the 18.432MHz crystal using XTALE as the clock source:
D13
D12
D11
D10:00
Bits
N/A
R/W
N/A
R/W
Access
Reserved
RICS
Reserved
NREG
Mnemonic
N/A
0
N/A
0
Reset
N/A
Receiver internal clock source
0
1
When the RXSRC field is set to 0, the receiver
operates using an internal clock. There are two
sources for internal clocks: the bit-rate generator
(BRG) and the receiver digital phase lock loop
(DPLL). The BRG uses a divider mechanism for
clock generation. The DPLL extracts the clock from
the incoming receive data stream.
N/A
N register
The N register value is determined by the following
equations. F
TMODE and TDCR/RDCR settings. For a 16x
setting, for example, F
baud rate.
F
F
F
F
The maximum value for F
F
See Table 91: "Bit rate examples" on page 249 for
sample bit rates.
Description
BRG
BRG
BRG
BRG
SYSCLK
w w w . d i g i e m b e d d e d . c o m
BRG; the transmitter uses BRG output for its
clock
DPLL; the receiver uses the extracted clock
provided by the DPLL.
Using a CLKMUX setting of 00
Using a CLKMUX setting of 01
Using a CLKMUX setting of 10
Using a CLKMUX setting of 11
= F
= F
= F
= F
/4.
XTALE
SYSCLK
OUT1
OUT2
BRG
/[2*(N+1)
/[2*(N+1)
/[2*(N+1)
must be adjusted according to the
/[2*(N+1)
S e r i a l C o n t r o l l e r M o d u l e
BRG
OUT1
is 16 times the desired
and F
OUT2
is
2 4 7