MCP2150 Microchip Technology, Inc., MCP2150 Datasheet - Page 8

• Manufacturer Part Number: MCP2150
• Description: The MCP2150 Provides Irda Protocol Handling Plus Bit Encoding/decoding Functionality For Data Terminal Equipment (DTE) Applications in One Low Pincount Device
• Manufacturer: Microchip Technology, Inc.

MCP2150
2.4
The device crystal is used to derive the communication
bit clock (BITCLK). There are 16 BITCLKs for each bit
time. The BITCLKs are used for the generation of the
start bit and the eight data bits. The stop bit uses the
BITCLK when the data is transmitted (not for
reception).
This clock is a fixed frequency and has minimal
variation
manufacturer).
DS21655B-page 8
Bit Clock
in
frequency
(specified
by
crystal
Preliminary
2.5
The UART interface communicates with the "control-
ler". This interface is a half duplex interface, meaning
that the system is either transmitting or receiving, but
not both simultaneously.
2.5.1
The baud rate for the MCP2150 serial port (the TX and
RX pins) is configured by the state of the BAUD1 and
BAUD0 pins. These two device pins are used to select
the baud rate at which the MCP2150 will transmit and
receive serial data (not IR data).
baud rate configurations.
TABLE 2-3:
2.5.2
When the controller sends serial data to the MCP2150,
the controller’s baud rate is required to match the baud
rate of the MCP2150’s serial port.
2.5.3
When the controller receives serial data from the
MCP2150, the controller’s baud rate is required to
match the baud rate of the MCP2150’s serial port.
BAUD1:BAUD0
00
01
10
11
UART Interface
BAUD RATE
TRANSMITTING
RECEIVING
SERIAL BAUD RATE
SELECTION VS. FREQUENCY
Baud Rate @
11.0592 MHz
115200
19200
57600
9600
2002 Microchip Technology Inc.
Table 2-3
F
F
F
F
OSC
Bit Rate
OSC
OSC
OSC
shows the
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