MAX6884ETP MAXIM [Maxim Integrated Products], MAX6884ETP Datasheet - Page 25

• Manufacturer Part Number: MAX6884ETP
• Description: EEPROM-Programmable, Hex Power-Supply Supervisory Circuits
• Manufacturer: MAXIM [Maxim Integrated Products]

The MAX6884/MAX6885 factory-default configuration
sets all registers to 00h except for bits R91h[0],
R92h[0], R93h[0], R94h[0], R95h[0], which are set to 1.
This configuration sets all three programmable outputs
(RESET, UV/OV, WDO) as open drain, and RESET and
UV/OV dependent on MR (putting all outputs into high-
Table
Figure 5. Memory Map
REGISTER
ADDRESS
2Ah
00h
17h
18h
2Ah
25h
26h
27h
28h
29h
CONFIGURATION
ADC AND FAULT
REGISTER BANK
12. Register Map (continued)
(READ ONLY)
REGISTERS
Configuring the MAX6884/MAX6885
(R/W)
DATA
______________________________________________________________________________________
80h
97h
ADDRESS
MEMORY
EEPROM
CONFIGURATION
—
—
—
—
—
—
EEPROM
Power-Supply Supervisory Circuits
40h
7Fh
WRITE
READ/
USER EEPROM
R
R
R
R
R
R
EEPROM-Programmable, Hex
ADC Conversion Data for AUXIN (2 LSBs) (Table 3)
ADC Conversion Data for V
ADC Conversion Data for V
Fault Flags for Primary Voltage Detectors (Table 9)
Fault Flags for Secondary Voltage Detectors (Table 9)
Fault Flags for RESET, UV/OV, and WDO (Table 9)
impedance states until the device is reconfigured by
the user). Each device requires configuration before full
power is applied to the system. Below is a general
step-by-step procedure for programming the
MAX6884/MAX6885:
1) Apply a supply voltage to IN1–IN4 or V
2) Transmit data through the serial interface. Write to
3) Use the read word protocol to read back the data from
4) Write the same data written to the configuration reg-
A software reboot restores the EEPROM configuration
to the volatile registers without cycling the power sup-
plies. Use the send byte command with data byte C4h
to initiate a software reboot. The 2.5ms (max) power-up
delay also applies after a software reboot.
ing on the programmed configuration (see the
Powering the MAX6884/MAX6885 section). The
applied voltage must be 2.7V or higher.
the configuration registers first to ensure the device
is configured properly (see the Write Byte and
Block Write sections).
the configuration registers to verify the data was writ-
ten (see the Receive Byte and Block Read sections).
isters to the appropriate configuration EEPROM reg-
isters. After completing EEPROM configuration,
apply full power to the system to begin normal oper-
ation. The nonvolatile EEPROM stores the configura-
tion information while power is off.
CC
CC
DESCRIPTION
(8 MSBs) (Table 3)
(2 LSBs) (Table 3)
Software Reboot
CC
, depend-
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