Page 100 - Engineering Digital Design

Table 2.12 Unit distance codes: (1) a decimal code
(nonreflective); (2) four-bit Gray code (reflective);
(3) XS3 Gray decimal code (reflective)

(D f (2) (3)
Decimsl Decimal 4-Bit XS3 Gray
Value Code Gray Code Decimsl Code
0 0000 0000 0010
1 0001 0001 0110
2 0011 0011 0111
3 0010 0010 0101
4 0110 0110 0100
5 1110 0111 1100
6 mi i 0101 1101
7 1101 0100 mi
8 1100 1100 1110
9 0100 1101 1010
10 — mi —
11 — 1110 —
12 — 1010 —
13 — ion —
14 — 1001 —
15 — 1000 —

Table 2.13 ASCII character code
363534 (column)

Row 000 001 010 on 100 101 no 111
3332313Q (Hex) 0 1 2 3 4 5 6 7
'
0000 0 NUL OLE SP 0 @ P P
0001 1 SOH DC1 ! 1 A Q 3 q
0010 2 STX DC2 2 B R b r
0011 3 ETX DC3 # 3 C S C s
0100 4 EOT DC4 $ 4 D T d t
0101 5 ENQ NAK % 5 E U e u
0110 6 ACK SYN & 6 F V f V
0111 7 BEL ETB 7 G w g w
1000 8 BS CAN ( 8 H X h X
1001 9 HT EM ) 9 I Y i y
1010 A LF SUB * J Z J Z
1011 B VT ESC + ; K [ k {
1100 C FF FS < L \ 1 1
1101 D CR GS = M ] m }
1110 E SO RS > N A n ~
mi F SI US / ? O - o DEL

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