NS7520B-1-I46 Digi International, NS7520B-1-I46 Datasheet - Page 93

• 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

Interrupt controller registers
Interrupts come from different sources on the chip and are managed with Interrupt
Control registers. Interrupts can be enabled/disabled on a per-source basis using the
Interrupt Enable registers. These registers serve as masks for the different interrupt
sources.
Address: FFB0 0030 / 0034 / 0038
There are five pairs of registers in the interrupt controller:
Register bit assignment
All registers use the same 32-bit layout.
1 RX
SER
15
31
Interrupt Enable register. A read/write location for reading and writing all
interrupt enable bits as a typical register.
Interrupt Enable Set/Interrupt Status Enabled registers. Perform two
different functions depending on whether a register is read or written:
–
–
Interrupt Enable Clear/Interrupt Status Raw registers. Perform two
different functions depending on whether a register is read or written:
–
–
1 TX
SER
30
14
When read, the register indicates the current state of all enabled
interrupts.
When written, a 1 in a bit position sets that interrupt enable; a 0 in a bit
position has no effect.
When read, the register indicates the current state of all interrupts
regardless of the state of the enables.
When written, a 1 in a bit position clears that interrupt enable; a 0 in a bit
position has no effect.
2 RX
SER
29
13
2 TX
SER
28
12
27
11
26
10
Reserved
DMA1-13
25
9
24
8
MAC1
w w w . d i g i e m b e d d e d . c o m
23
7
Watch
Dog
22
6
Timer
21
5
1
Timer
20
4
2
PORT
19
C3
3
PORT
Rsvd
18
C2
2
G E N M o d u l e
ENET
PORT
1 RX
C1
17
1
PORT
ENET
1 TX
16
C0
0
8 1