cy7b933-sct Cypress Semiconductor Corporation., cy7b933-sct Datasheet - Page 25

• Manufacturer Part Number: cy7b933-sct
• Description: Hotlink Transmitter/receiver
• Manufacturer: Cypress Semiconductor Corporation.

Document #: 38-02017 Rev. *E
Valid Special Character Codes and Sequences (SC/D = HIGH)
K28.0
K28.1
K28.2
K28.3
K28.4
K28.5
K28.6
K28.7
K23.7
K27.7
K29.7
K30.7
Idle
R_RDY
EOFxx
C−SOF
P−SOF
Exception
−K28.5
+K28.5
Exception
Notes:
S.C. Byte Name
1. All codes not shown are reserved.
2. Notation for Special Character Byte Name is consistent with Fibre Channel and ESCON naming conventions. Special Character Code Name is intended to
3. C0.1 = Transmit Negative K28.5 (−K28.5+) disregarding Current RD when input is held for only one byte time. If held longer, transmitter begins sending the
4. C1.1 = Transmit Negative K28.5 (−K28.5+) disregarding Current RD when input is held for only one byte time. If held longer, transmitter begins sending the
5. C2.1 = Transmit either −K28.5+ or +K28.5− as determined by Current RD and modify the Transmission Character that follows, by setting its least significant bit
6. C0.7 = Transmit a deliberate code rule violation. The code chosen for this function follows the normal Running Disparity rules. Transmission of this Special
describe binary information present on I/O pins. Common usage for the name can either be in the form used for describing Data patterns (i.e., C0.0 through
C31.7), or in hex notation (i.e., Cnn where nn = the specified value between 00 and FF).
repeating transmit sequence −K28.5+, D21.4, D21.5, D21.5, (repeat all four bytes)... defined in X3.230 as the primitive signal “Idle word.” This Special Character
input must be held for four (4) byte times or multiples of four bytes or it will be truncated by the new data. The receiver will never output this Special Character,
since K28.5 is decoded as C5.0, C1.7, or C2.7, and the subsequent bytes are decoded as data.
repeating transmit sequence −K28.5+, D21.4, D10.2, D10.2,(repeat all four bytes)... defined in X3.230 as the primitive signal “Receiver_Ready (R_RDY).” This
Special Character input must be held for four (4) byte times or multiples of four bytes or it will be truncated by the new data.
The receiver will never output this Special Character, since K28.5 is decoded as C5.0, C1.7, or C2.7 and the subsequent bytes are decoded as data.
to 1 or 0. If Current RD at the start of the following character is plus (+) the LSB is set to 0, and if Current RD is minus (−) the LSB becomes 1. This modification
allows construction of X3.230 “EOF” frame delimiters wherein the second data byte is determined by the Current RD.
For example, to send “EOFdt” the controller could issue the sequence C2.1−D21.4− D21.4−D21.4, and the HOTLink Transmitter will send either
K28.5−D21.4−D21.4−D21.4 or K28.5−D21.5− D21.4−D21.4 based on Current RD. Likewise to send “EOFdti” the controller could issue the sequence
C2.1−D10.4−D21.4−D21.4, and the HOTLink Transmitter will send either K28.5−D10.4−D21.4− D21.4 or K28.5−D10.5−D21.4− D21.4 based on Current RD.
The receiver will never output this Special Character, since K28.5 is decoded as C5.0, C1.7, or C2.7, and the subsequent bytes are decoded as data.
Character has the same effect as asserting SVS = HIGH.
The receiver will only output this Special Character if the Transmission Character being decoded is not found in the tables.
C0.0
C1.0
C2.0
C3.0
C4.0
C5.0
C6.0
C7.0
C8.0
C9.0
C10.0
C11.0
C0.1
C1.1
C2.1
Follows K28.1 for ESCON Connect−SOF (Rx indication only)
C7.1
Follows K28.5 for ESCON Passive−SOF (Rx indication only)
C7.2
C0.7
C1.7
C2.7
C4.7
S.C. Code Name
(C00)
(C01)
(C02)
(C03)
(C04)
(C05)
(C06)
(C07)
(C08)
(C09)
(C0A)
(C0B)
(C20)
(C21)
(C22)
(C27)
(C47)
(CE0)
(CE1)
(CE2)
(CE4)
000
000
000
000
000
000
000
000
000
000
000
000
001
001
001
001
010
111
111
111
111
HGF
Bits
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
00000
00001
00010
00111
00111
00000
00001
00010
00100
EDCBA
001111
001111
001111
001111
001111
001111
001111
001111
111010
110110
101110
011110
−K28.5+,D21.4,D21.5,D21.5,repeat
−K28.5+,D21.4,D10.2,D10.2,repeat
−K28.5,Dn.xxx0
001111
001111
Code Rule Violation and SVS Tx Pattern
100111
001111
110000
Running Disparity Violation Pattern
110111
abcdei
[1, 2]
Current RD−
0100
1001
0101
0011
0010
1010
0110
1000
1000
1000
1000
1000
1000
1000
1000
1010
0101
0101
fghj
[5]
+K28.5,Dn.xxx1
[6]
[29]
[30]
[31]
110000
110000
110000
110000
110000
110000
110000
110000
110000
110000
000101
001001
010001
100001
011000
001111
110000
001000
abcdei
[5]
Current RD+
CY7B923
CY7B933
[3]
[4]
Page 25 of 33
1011
0110
1010
1100
1101
0101
1001
0111
0111
0111
0111
0111
0111
0111
0111
1010
0101
1010
fghj
[6]
[29]
[30]
[31]
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