Information

Installation and Operation

TABLE 2-2: MCP2122 AND MCP2120 BAUD RATE SELECTION

MODE

PWM

Frequency

MCP2122

Baud

MCP2120

Baud

Comment

73 2:0

1 1 1 1,843,200 115,200 Note 1 Designed for use with MCP2122 only

1 1 0 921,600 57,600 Note 1 Designed for use with MCP2122 only

1 0 1 460,800 28,800 Note 1 Designed for use with MCP2122 only

1 0 0 — Reserved Note 1 Designed for use with MCP2122 only

0 1 1 — Reserved Note 1 Designed for use with MCP2122 only

0 1 0 614,400 38,400 Note 1 Designed for use with MCP2122 only

0 0 1 307,200 19,200 Note 1 Designed for use with MCP2122 only

0 0 0 153,600 9,600 Note 1 Designed for use with MCP2122 only

1 1 1

3.6864 MHz

230,400

(Note 3)

Reserved

1 1 0 57,600 MCP2120’s BAUD2:0 pins = “1 0 0”.

1 0 1 Reserved

1 0 0 Reserved

0 1 1 Reserved

0 1 0 38,400 MCP2120’s BAUD2:0 pins = “0 1 0”.

0 0 1 19,200 MCP2120’s BAUD2:0 pins = “0 0 1”.

0 0 0 9,600 MCP2120’s BAUD2:0 pins = “0 0 0“.

1 1 1

0MHz Note 4

115,200 MCP2120’s BAUD2:0 pins = “1 0 0“. (Note 2)

1 1 0 57,600 MCP2120’s BAUD2:0 pins = “0 1 1“. (Note 2)

1 0 1 Reserved

1 0 0 Reserved

0 1 1 Reserved

0 1 0 38,400 MCP2120’s BAUD2:0 pins = “0 1 0“. (Note 2)

0 0 1 19,200 MCP2120’s BAUD2:0 pins = “0 0 1“. (Note 2)

0 0 0 9,600 MCP2120’s BAUD2:0 pins = “0 0 0“. (Note 2)

Legend:X = Undefined (either "1" or "0").

Note 1: Baud rate would be dependant on the state of the MCP2120’s BAUD2:0 pins.

2: A 7.3728 MHz external crystal must be used.

3: This exceeds the device’s maximum specification.

4: The MCP2122 16XCLK signal is static.