MCP39F511N datasheet(19/61 Pages) MICROCHIP

19 / 61 page

 2015-2018 Microchip Technology Inc.

DS20005473B-page 19

MCP39F511N

4.6

Command Descriptions

4.6.1

The Register Read, N Bytes command returns

the N bytes that follow whatever the current address

pointer is set to. It should typically follow a Set

Address

Pointer

command and can be used in

conjunction

with

other

read

commands. An

Acknowledge, Data and Checksum is the response for

this command. The maximum number of bytes that can

be read with this command is 32. If there are other read

commands within a frame, the maximum number of

bytes that can be read is 32 minus the number of bytes

being read in the frame. With this command, the data is

returned LSB first.

4.6.2

The Register

Write,

Bytes

command is

followed by N bytes that will be written to whatever the

current address pointer is set to. It should typically

follow a Set Address Pointer command and can

be used in conjunction with other write commands. An

Acknowledge is the response for this command. The

maximum number of bytes that can be written with this

command is 32. If there are other write commands

within a frame, the maximum number of bytes that can

be written is 32 minus the number of bytes being

written in the frame. With this command, the data is

written LSB first.

4.6.3

SET ADDRESS POINTER (0x41)

This command is used to set the address pointer for all

read and write commands. This command is expecting

the address pointer as the command parameter in the

following two bytes: Address High Byte followed by

Address Low Byte. The address pointer is two bytes in

length. If the address pointer is within the acceptable

addresses of the device, an Acknowledge will be

returned.

4.6.4

SAVE REGISTERS TO FLASH (0x53)

The Save Registers To Flash command makes

a copy of all the calibration and configuration registers

to flash. This includes all R/W registers in the register

set. The response to this command is an Acknowledge.

4.6.5

PAGE READ EEPROM (0x42)

The Page Read EEPROM command returns 16 bytes

of data that are stored in an individual page on the

MCP39F511N. A more complete description of the

memory organization of the EEPROM can be found in

Section 10.0 “EEPROM”. This command is expecting

the EEPROM page as the command parameter or the

following byte. The response to this command is an

Acknowledge, 16-bytes of data and CRC Checksum.

4.6.6

PAGE WRITE EEPROM (0x50)

The Page Write EEPROM command is expecting

17 additional bytes in the command parameters, which

are the EEPROM page plus 16 bytes of data. A more

complete description of the memory organization of the

EEPROM can be found in Section 10.0 “EEPROM”.

The response to this command is an Acknowledge.

4.6.7

BULK ERASE EEPROM (0x4F)

The Bulk Erase EEPROM command will erase the

entire EEPROM array and return it to a state of 0xFFFF

for each memory location of EEPROM. A more

complete description of the memory organization of the

EEPROM can be found in Section 10.0 “EEPROM”.

The response to this command is Acknowledge.

4.6.8

AUTO-CALIBRATE GAIN (0x5A)

The Auto-Calibrate Gain command initiates the

single-point calibration that is all that is typically

required for the system. This command calibrates the

RMS current, RMS voltage and Active power based on

the target values written in the corresponding registers.

The instruction parameter for this command selects if

you are calibrating channel 1, 2 or both. Bit 0

corresponds to channel 1 and bit 1 corresponds to

channel

See

Section 9.0

“MCP39F511N

Calibration”

for

information

device

calibration. The response to this command is

Acknowledge.

TABLE 4-11:

AUTO-CALIBRATE FREQUENCY COMMAND

Byte #

Value

Description

Response from

0xA5

Header Byte

0x04

Number of Bytes in Frame

0x76

Command (Auto-Calibrate Frequency)

0x1F

Checksum

ACK (or NAK if unable to calibrate)(1)

Note 1: See Section 9.0 “MCP39F511N Calibration” for more information.

MCP39F511N Datasheet(PDF) 19 Page - Microchip Technology

MCP39F511N Datasheet(HTML) 19 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61

Datasheet Download

Link URL