EP9312-IB Cirrus Logic Inc, EP9312-IB Datasheet - Page 327

• Manufacturer Part Number: EP9312-IB
• Description: IC ARM920T MCU 200MHZ 352-PBGA
• Manufacturer: Cirrus Logic Inc
• Series: EP9r

Specifications of EP9312-IB

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, EIDE, Ethernet, I²C, IrDA, Keypad/Touchscreen, SPI, UART/USART, USB
• Peripherals: AC'97, DMA, I&sup2:S, LCD, LED, MaverickKey, POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 3.6 V
• Data Converters: A/D 8x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 352-BGA
• Processor Series: EP93xx
• Core: ARM920T
• Data Bus Width: 32 bit
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: No
• Other names: 598-1259

DS785UM1
9.2.3.6 Receive Frame Pre-Processing
The MAC pre-processes all incoming receive frames. First the frame is either passed on to
the next level or discarded according to the destination address filter. The next decision is
whether to accept the frame. A frame is accepted when the frame data are brought into MAC
through internal memory. The final step in frame pre-processing is the decision on causing an
interrupt. These pre-processing steps are detailed in
A c c e p t M a s k s :
P r o m i s c u o u s A
B r o a d c a s t A
F i l t e r T a p s :
C R C R u n t A
In d i v i d u a l A
M u l t i c a s t A
E n d O f S r e a m i E
IA H a s h A
i E - M a s k T a p s :
R e c e i v e S t Q i E
R u n t A
Figure 9-12. Receive Frame Pre-processing
Copyright 2007 Cirrus Logic
i s A c c e p t e d i n t o t h e c h i p
a n d t h e F r a m e B o d y
S t a t u s i n R x E v e n t
F r a m e i s p a s s e d
In c o m i n g F r a m e
t o h o s t m e m o r y
b y d e s c r i p t o r
D e s t i n a t i o n
A c c e p t ( A )
p r o c e s s o r
A d d r e s s
M a s k
F i l t e r
i E
M a s k
A c c e p t M a s k
F i l t e r P a s s e d
P A S S E D
Figure
A c c e p t M a s k
P A S S E D
N O T
1/10/100 Mbps Ethernet LAN Controller
9-12.
If t h e f i l t e r i s n o t p a s s e d ,
t h e f r a m e i s d i s c a r d e d .
In t e r r u p t i f M a s k O K
d i s c a r d e d
EP93xx User’s Guide
f r a m e
9-25
9