s3c4510b Samsung Semiconductor, Inc., s3c4510b Datasheet - Page 9
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
TXD[3:0]
LOOP_10M
TXD_10M
TX_EN/
TXEN_10M
TX_ERR/
PCOMP_10M
CRS/CRS_10M
RX_CLK/
RXCLK_10M
RXD[3:0]/
RXD_10M
Signal
44, 43, 40,
35, 34, 33,
Pin No.
39
47
45
28
37
30
Table 1-1. S3C4510B Signal Descriptions (Continued)
Type
O
O
O
I
I
I
Transmit Data/Transmit Data for 10 M/Loop-back for 10M.
Transmit data is aligned on nibble boundaries. TXD[0]
corresponds to the first bit to be transmitted on the physical
medium, which is the LSB of the first byte and the fifth bit of that
byte during the next clock. TXD_10M is shared with TXD[0] and
is a data line for transmitting to the 10-Mbit/s PHY. LOOP_10M is
shared with TXD[1] and is driven by the loop-back bit in the
control register.
Transmit Enable/Transmit Enable for 10M. TX_EN provides
precise framing for the data carried on TXD[3:0]. This pin is
active during the clock periods in which TXD[3:0] contains valid
data to be transmitted from the preamble stage through CRC.
When the controller is ready to transfer data, it asserts
TXEN_10M.
Transmit Error/Packet Compression Enable for 10M. TX_ERR is
driven synchronously to TX_CLK and sampled continuously by
the Physical Layer Entity, PHY. If asserted for one or more
TX_CLK periods, TX_ERR causes the PHY to emit one or more
symbols which are not part of the valid data, or delimiter set
located somewhere in the frame that is being transmitted.
PCOMP_10M is asserted immediately after the packet's DA field
is received. PCOMP_10M is used with the Management Bus of
the DP83950 Repeater Interface Controller (from National
Semiconductor). The MAC can be programmed to assert
PCOMP if there is a CAM match, or if there is not a match. The
RIC (Repeater Interface Controller) uses this signal to compress
(shorten) the packet received for management purposes and to
reduce memory usage. (See the DP83950 Data Sheet, published
by National Semiconductor, for details on the RIC Management
Bus.). This pin is controlled by a special register, with which you
can define the polarity and assertion method (CAM match active
or not match active) of the PCOMP signal.
Carrier Sense/Carrier Sense for 10M. CRS is asserted
asynchronously with minimum delay from the detection of a non-
idle medium in MII mode. CRS_10M is asserted when a 10-
Mbit/s PHY has data to transfer. A 10-Mbit/s transmission also
uses this signal.
Receive Clock/Receive Clock for 10M. RX_CLK is a continuous
clock signal. Its frequency is 25 MHz for 100-Mbit/s operation,
and 2.5 MHz for 10-Mbit/s. RXD[3:0], RX_DV, and RX_ERR are
driven by the PHY off the falling edge of RX_CLK, and sampled
on the rising edge of RX_CLK. To receive data, the TXCLK_10 M
clock comes from the 10-Mbit/s PHY.
Receive Data/Receive Data for 10M. RXD is aligned on nibble
boundaries. RXD[0] corresponds to the first bit received on the
physical medium, which is the LSB of the byte in one clock
period and the fifth bit of that byte in the next clock. RXD_10M is
shared with RXD[0] and it is a line for receiving data from the 10-
Mbit/s PHY.
Description
PRODUCT OVERVIEW
1-9
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