MCP8024 datasheet(25/46 Pages) MICROCHIP

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 2013 Microchip Technology Inc.

DS20005228A-page 25

MCP8024

The Brown-out Reset – Config Lost bit 4 of

status message 1 will be set every time the device

restarts due to a brown-out event or a normal start-up.

When the bit is set, an unsolicited message will be

sent to the host indicating a Reset has taken place and

that the configuration data may have been lost. The

flag is reset by a “Status 1 Ack” (01000110 (46H))

from the device in response to a Host Status Request

command.

4.5.4.3.4 SET_CFG_1

There is a SET_CFG_1 message that is sent by the

host to the MCP8024 device to configure the motor

current limit reference DAC. The SET_CFG_1 mes-

sage may be sent to the device at any time. The host

is responsible for making sure the system is in a state

that will not be compromised by sending the SET_CF-

G_1

message. The SET_CFG_1 message format is

indicated in Table 4-2. The response is indicated in

Table 4-3.

4.5.4.3.5 GET_CFG_1

There is a GET_CFG_1 message that is sent by the

host to the MCP8024 device to retrieve the motor cur-

rent limit reference DAC Configuration register. The

GET_CFG_1

message format is indicated in Table 4-2.

The response is indicated in Table 4-3.

4.5.4.3.6 SET_CFG_2

There is a SET_CFG_2 message that is sent by the

host to the MCP8024 device to configure the driver

current limit blanking time. The SET_CFG_2 message

may be sent to the device at any time. The host is

responsible for making sure the system is in a state

that will not be compromised by sending the SET_CF-

G_2

message. The SET_CFG_2 message format is

indicated in Table 4-2. The response is indicated in

Table 4-3.

4.5.4.3.7 GET_CFG_2

There is a GET_CFG_2 message that is sent by the

host to the MCP8024 device to retrieve the device

Configuration register #2. The GET_CFG_2 message

format is indicated in Table 4-2. The response is indi-

cated in Table 4-3.

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