MEC1322 Datasheet, PDF (178/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

MEC1322
14.0 UART
14.1 Introduction
The 16550 UART (Universal Asynchronous Receiver/Transmitter) is a full-function Two Pin Serial Port that supports the
standard RS-232 Interface.
14.2 References
1. EIA Standard RS-232-C specification
14.3 Interface
This block is designed to be accessed externally via the pin interface and internally via a registered host interface.
FIGURE 14-1:
I/O DIAGRAM OF BLOCK
Host Interface
UART
Power, Clocks and Reset
Signal Description
Interrupts
14.4 Signal Description
TABLE 14-1: SIGNAL DESCRIPTION TABLE
Name
Direction
Description
TXD
RXD
Output
Input
Transmit serial data output.
Receiver serial data input.
14.5 Host Interface
The UART is accessed by host software via a registered interface, as defined in Section 14.10, "Configuration Regis-
ters"and Section 14.11, "Runtime Registers".
DS00001719D-page 178
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