s3c4510b Samsung Semiconductor, Inc., s3c4510b Datasheet - Page 229
s3c4510b
Manufacturer Part Number
s3c4510b
Description
16/32-bit Risc Microcontroller
Manufacturer
Samsung Semiconductor, Inc.
Datasheet
1.S3C4510B.pdf
(422 pages)
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S3C4510B
THE MAC TRANSMIT BLOCK
The MAC transmit block is responsible for transmitting data. It complies with the IEEE802.3 standard for carrier
sense multiple access with collision detection (CSMA/CD) protocol. The MAC transmit block consists of the
following sections:
— Transmit FIFO and controllers
— Preamble and jam generators
— Pad generator
— Parallel CRC generator
— Threshold logic and counters
— Back-off and retransmit timers
— Transmit state machine
Figure 7-3 shows the MAC transmit function blocks in detail.
B
D
I
and PARITY
Tx_DB [7:0]
Tx_EOF
Tx_wr#
Tx_rdy
SYS_CLK Domain
and Counter
Write FIFO
Threshold
Controller
Logic and
Counters
9
Figure 7-3. MAC Transmit Function Blocks
Transmit
(80 x 9)
FIFO
MAC
Check
Parity
9
Tx_CLK Domain
Back off and
and Counter
Read FIFO
Retransmit
Controller
Generator
Timers
PAD
JAM generator
Preamble and
Generator
CRC
8
Transmit
Matchine
State
ETHERNET CONTROLLER
TxD [3:0]
Tx_CLK
Tx_en
Tx_er
CrS
Col
10
I/F
M
M
a
n
d
b
y
e
I
I
t
7-7
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