MCP2120-ISL Datasheet, PDF (20/36 Pages) Microchip Technology – Infrared Encoder/Decoder

MCP2120
FIGURE 4-6:
USART ASynchronous Transmission Waveform
Start Bit
IR100
Data Bit
IR100
Data Bit
IR100
Data Bit
IR100
TX pin
Note:
IR103
Refer to Figure 4-2 for load conditions.
IR103
TABLE 4-6: USART ASYNCHRONOUS TRANSMISSION REQUIREMENTS
AC Characteristics
Standard Operating Conditions (unless otherwise specified)
Operating Temperature
–40°C ≤ TA ≤ +85°C (industrial)
Operating Voltage VDD range is described in Section 4.1 “DC
Characteristics”
Param.
No.
Sym
Characteristic
Min
Typ Max Units
Conditions
IR100 TTXBIT Transmit Baud rate
768
384
192
128
64
768
384
192
128
64
IR101 ETXBIT Transmit (TX pin) Baud rate
—
Error (into MCP2120)
IR102 ETXIRBIT Transmit (TXIR pin) Baud rate
—
Error (out of MCP2120)⁽¹⁾
IR103 TTXRF TX pin rise time and fall time
—
Note 1: This error is not additive to IR101 parameter.
Hardware Selection
—
768 TOSC BAUD2:BAUD0 = 000
—
384 TOSC BAUD2:BAUD0 = 001
—
192 TOSC BAUD2:BAUD0 = 010
—
128 TOSC BAUD2:BAUD0 = 011
—
64
TOSC BAUD2:BAUD0 = 100
Software Selection
BAUD2:BAUD0 = 111
—
768 TOSC Hex Command = 0x87
—
384 TOSC Hex Command = 0x8B
—
192 TOSC Hex Command = 0x85
—
128 TOSC Hex Command = 0x83
—
64
TOSC Hex Command = 0x81
—
1
%
—
1
%
—
25
ns
DS21618B-page 20
© 2007 Microchip Technology Inc.