CY7C924ADX-AC Cypress Semiconductor Corp, CY7C924ADX-AC Datasheet - Page 50

• Manufacturer Part Number: CY7C924ADX-AC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C924ADX-AC

• Number Of Transceivers: 1
• Data Rate: 622Mbps
• Operating Supply Voltage (typ): 5V
• Supply Current (max): 250mA
• Screening Level: Commercial
• Pin Count: 100
• Mounting: Surface Mount
• Package Type: TQFP
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temperature (min): 0C
• Operating Temperature (max): 70C
• Lead Free Status / RoHS Status: Not Compliant

Document #: 38-02008 Rev. *E
sub-block. Running disparity at the beginning of the 6-bit
sub-block is the running disparity at the end of the previous
Transmission Character. Running disparity at the beginning of
the 4-bit sub-block is the running disparity at the end of the
6-bit sub-block. Running disparity at the end of the Trans-
mission Character is the running disparity at the end of the
4-bit sub-block.
Running disparity for the sub-blocks is calculated as follows:
Use of the Tables for Generating Transmission Characters
The appropriate encoding for the Valid Data byte or the Special
Character byte into a Transmission Character is listed in the
character encoding
of the Transmitter’s running disparity is used to select the
Transmission Character from its corresponding column. For
each Transmission Character transmitted, a new value of the
running disparity is calculated. This new value is used as the
Transmitter’s current running disparity for the next Valid Data
byte or Special Character byte to be encoded and transmitted.
Table 9
mission characters.
Table 10.Code Violations Resulting from Prior Errors
1. Running disparity at the end of any sub-block is positive if
2. Running disparity at the end of any sub-block is negative if
3. Otherwise, running disparity at the end of the sub-block is
Transmitted data character
Transmitted bit stream
Bit stream after error
Decoded data character
the sub-block contains more ones than zeros. It is also pos-
itive at the end of the 6-bit sub-block if the 6-bit sub-block
is 000111, and it is positive at the end of the 4-bit sub-block
if the 4-bit sub-block is 0011.
the sub-block contains more zeros than ones. It is also
negative at the end of the 6-bit sub-block if the 6-bit
sub-block is 111000, and it is negative at the end of the 4-bit
sub-block if the 4-bit sub-block is 1100.
the same as at the beginning of the sub-block.
shows naming notations and examples of valid trans-
Table 11
and
Table
RD
–
–
–
–
12. The current value
101010 1001
101010 1011
Character
D21.1
D21.0
RD
–
–
+
+
Table 9. Valid Transmission Characters
Use of the Tables for Checking the Validity of Received
Transmission Characters
The column corresponding to the current value of the
Receiver’s running disparity is searched for the received
Transmission Character. If the received Transmission
Character is found in the proper column, then the Trans-
mission Character is valid and the associated Data byte or
Special Character code is determined (decoded). If the
received Transmission Character is not found in that column,
then the Transmission Character is invalid. This is called a
code violation. Independent of the Transmission Character’s
validity, the received Transmission Character is used to
calculate a new value of running disparity. The new value is
used as the Receiver’s current running disparity for the next
received Transmission Character.Detection of a code violation
does not necessarily show that the Transmission Character in
which the code violation was detected is in error. Code viola-
tions may result from a prior error that altered the running
disparity of the bit stream which did not result in a detectable
error at the Transmission Character in which the error
occurred.
Byte Name
010101 0101
010101 0101
D30.7
D31.7
Character
D0.0
D1.0
D2.0
D5.2
Table 10
D10.2
D10.2
.
.
.
.
shows an example of this behavior.
TX
765
000
000
000
010
111
111
.
.
.
.
RD
IN
–
–
+
+
Data
or RX
000101
43210
00000
00001
00010
11110
11111
OUT
Code Violation
.
.
.
.
111010 1010
111010 1010
Character
CY7C924ADX
D23.5
Hex Value
Page 50 of 58
FE
FF
00
01
02
45
.
.
.
.
RD
+
+
+
+
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