diff options
| -rw-r--r-- | share/doc/handbook/uart.sgml | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/share/doc/handbook/uart.sgml b/share/doc/handbook/uart.sgml index 74ce20b..a0a657c 100644 --- a/share/doc/handbook/uart.sgml +++ b/share/doc/handbook/uart.sgml @@ -1,4 +1,4 @@ -<!-- $Id: uart.sgml,v 1.1 1996/02/16 13:28:22 jkh Exp $ --> +<!-- $Id: uart.sgml,v 1.2 1996/02/27 15:57:51 jfieber Exp $ --> <!-- The FreeBSD Documentation Project --> <!-- @@ -33,7 +33,7 @@ "S" if it supports Synchronous communications. Both forms are described below. - Some common acryonyms are: + Some common acronyms are: <quote>UART Universal Asynchronous Receiver/Transmitter</quote> <quote>USART Universal Synchronous-Asynchronous Receiver/Transmitter</quote> @@ -297,7 +297,7 @@ Pin Pin Symbol Symbol <sect3><heading>Bits, Baud and Symbols</heading> - <p>Baud is a measurment of transmission speed in asynchronous + <p>Baud is a measurement of transmission speed in asynchronous communication. Because of advances in modem communication technology, this term is frequently misused when describing the data rates in newer devices. @@ -505,10 +505,10 @@ Pin Pin Symbol Symbol "N" DIP (dual inline package) through hole straight lead type "V" LPCC (lead plastic chip carrier) J lead type</verb> - The "<em>g</em>" is the product grade field. If an "I" preceeds + The "<em>g</em>" is the product grade field. If an "I" precedes the package-type letter, it indicates an "industrial" grade part, which has higher specs than a standard part but not as high as - Miltary Specification (Milspec) component. This is an optional field. + Military Specification (Milspec) component. This is an optional field. So what we used to call a NS16550AFN (DIP Package) is now called a PC16550DN or PC16550DIN. @@ -526,7 +526,7 @@ Pin Pin Symbol Symbol In internal modems, the modem designer will frequently emulate the 8250A/16450 with the modem microprocessor, and the emulated UART will frequently have a hidden buffer consisting of several hundred bytes. - Because of the suze of the buffer, these emulations can be as + Because of the size of the buffer, these emulations can be as reliable as a 16550A in their ability to handle high speed data. However, most operating systems will still report that the UART is only a 8250A or 16450, and may not make effective use @@ -638,7 +638,7 @@ Sierra modem with an internal functionality. COMTEST appears to turn a blind eye to the differences within the National product line and reports no errors on the National parts (except for the original 16550) even when - there are official erattas that describe bugs in the A, B and C + there are official erratas that describe bugs in the A, B and C revisions of the parts, so this bias in COMTEST must be taken into account. @@ -948,7 +948,7 @@ Port Allowed to DCD. Bit 3 OUT 2 - An auxillary output that the host + An auxiliary output that the host processor may set high or low. In the IBM PC serial adapter (and most clones), OUT 2 is used to tri-state @@ -956,7 +956,7 @@ Port Allowed 8250/16450/16550 UART. Bit 2 OUT 1 - An auxillary output that the host + An auxiliary output that the host processor may set high or low. This output is not used on the IBM PC serial adapter. |
