NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 248

• 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

2 3 6
S e r i a l C h a n n e l r e g i s t e r s
Table 89: Serial Channel Status Register A bit definition
D21:20
D19
D18
D17
D16
Bits
R
R
R
R
R
Access
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
RXFDB
DCD
RI
DSR
CTS
Mnemonic
0
0
0
0
0
Reset
Receive FIFO data available
00
01
10
11
Identifies the number of valid bytes contained in the
next long word to be read from the Serial Channel
FIFO Data register. The next read of the FIFO can
contain one, two, three, or four valid bytes of data.
This field must be read before the FIFO is read, to
determine which bytes of the 4-byte long word
contain valid data.
Normal Endian byte-ordering rules apply to the Serial
Channel FIFO Data register.
Current data carrier detect state
0
1
Identifies the current state of the EIA data carrier
detect signal.
Current ring indicator state
0
1
Indicates the current state of the EIA ring indicator
signal.
Current data set ready state
0
1
Indicate the current state if the EIA data set ready
signal.
Current clear to send state
0
1
Identifies the current state of the EIA clear to send
signal.
Description
Inactive
Active
Inactive
Active
Inactive
Active
Inactive
Active
Full-word
One byte
Half-word
Three bytes (LENDIAN determines which
three)