Filter
Top Products
FUNCTIONAL
DESCRIPTION
STKP - Stick Parity:
Forces parity to logic 1 or logic 0 if parity is
enabled. See EPS, PEN, and figure 9.
EPS - Even Parity Select:
Selects even or odd parity if parity is enabled.
See STKP, PEN, and figure 9.
PEN - Parity Enable:
Enables parity on transmission and verification
on reception. See EPS, STKP, and figure 9.
+--------------+---------+
| STKP EPS PEN | Parity |
+--------------+---------+
| x x 0 | None |
| 0 0 1 | Odd |
| 0 1 1 | Even |
| 1 0 1 | Logic 1 |
| 1 1 1 | Logic 0 |
+--------------+---------+
Figure 9. 16550 parity selections.
STB - Number of Stop Bits:
Sets the number of stop bits transmitted. See
WLSx and figure 10.
WLSx - Word Length Select:
Determines the number of bits per transmitted
word. See STB and figure 10.
+---------------+-------------+-----------+
| STB WLS1 WLS0 | Word length | Stop bits |
+---------------+-------------+-----------+
| 0 0 0 | 5 bits | 1 |
| 0 0 1 | 6 bits | 1 |
| 0 1 0 | 7 bits | 1 |
| 0 1 1 | 8 bits | 1 |
| 1 0 0 | 5 bits | 1½ |
| 1 0 1 | 6 bits | 2 |
| 1 1 0 | 7 bits | 2 |
| 1 1 1 | 8 bits | 2 |
+---------------+-------------+-----------+
Figure 10. Word length and stop bit selections.
iii