|
| 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: |
|
|
|
|
|
|
|
| |||
|
| D e t e r m i n e s t h e n u m b e r o f b i t s p e r t r a n s m i t t e d | ||||||||||||
|
| 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
