MAX16067 datasheet(32/47 Pages) MAXIM

Part #	MAX16067

Description	6-Channel, Flash-Configurable System Manager with Nonvolatile Fault Registers

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Manufacturer	MAXIM [Maxim Integrated Products]

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32 _____________________________________________________________________________________

6-Channel, Flash-Configurable System Manager

with Nonvolatile Fault Registers

Slave Address

Use the slave address input, A0, to allow multiple identi-

cal devices to share the same serial bus. Connect A0 to

GND, DBP (or an external supply voltage greater than

2V), SCL, or SDA to set the device address on the bus.

See Table 26 for a listing of all possible 7-bit addresses.

The slave address can also be set to a custom value by

loading the address into register r8Bh[6:0]. See Table

25. If r8Bh[6:0] is loaded with 00h, the address is set by

input A0. Do not set the address to 09h or 7Fh to avoid

address conflicts. The slave address setting takes effect

immediately after writing to the register.

Packet Error Checking (PEC)

The MAX16067 features a packet-error checking (PEC)

mode that is useful to improve the reliability of the com-

munication bus by detecting bit errors. By enabling PEC,

an extra CRC-8 error check byte is added in the data

string during each read and/or write sequence. Enable

PEC by writing a ‘1’ to r8Bh[7].

The CRC-8 byte is calculated using the polynomial

C = X8 + X2 + X + 1

The PEC calculation includes all bytes in the transmis-

sion, including address, command and data. The PEC

calculation does not include ACK, NACK, START, STOP,

or REPEATED START.

Command Codes

The MAX16067 uses eight command codes for block

read, block write, and other commands. See Table 27

for a list of command codes.

To initiate a software reboot, send A7h using the send

byte format. A software-initiated reboot is function-

ally the same as a hardware-initiated power-on reset.

During boot-up, flash configuration data in the range

of 230h–28Ch is copied to r30h–r8Ch registers in the

default page.

Send command code A8h to trigger a fault store to flash.

Configure the Critical Fault Log Control register (6Dh) to

store ADC conversion results and/or fault flags.

While in the flash page, send command code A9h to

access the flash page (addresses from 200h–2FFh).

Once command code A9h has been sent, all addresses

are recognized as flash addresses only. Send command

code AAh to return to the default page (addresses from

000h–0FFh). Send command code ABh to access the

user flash-page (addresses from 300h–3FFh), and send

command code ACh to return to the flash page.

Table 25. SMBus Settings Register

Table 26. Setting the SMBus Slave Address

R = Read/write select bit.

REGISTER

ADDRESS

FLASH

ADDRESS

BIT RANGE

DESCRIPTION

8Bh

28Bh

[6:0]

SMBus Slave Address Register. Set to 00h to use A0 pin address

setting.

[7]

1= Enable PEC (Packet Error Check).

SLAVE ADDRESSES

A0

SLAVE ADDRESS

0

1010 100R

1

1010 101R

SCL

1010 110R

SDA

1010 111R

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