MAX8688ALETG/GH9 Maxim Integrated, MAX8688ALETG/GH9 Datasheet - Page 18

• Manufacturer Part Number: MAX8688ALETG/GH9
• Description: Current & Power Monitors & Regulators
• Manufacturer: Maxim Integrated

Specifications of MAX8688ALETG/GH9

• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 3 V
• Operating Temperature Range: - 40 C to + 85 C

Digital Power-Supply Controller/Monitor
with PMBus Interface
Figure 9. MAX8688 Initialization
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INITIALIZE INTERNAL
COMMUNICATION
CONFIGURATION
EXECUTE PMBus
VALID EEPROM?
ACCORDING TO
FROM EEPROM
ENABLE PMBus
SET ADDRESS
COMMAND?
REFERENCE
COMMAND
REGISTERS
INTERNAL
RESTORE
STABLE?
PMBus
RESET
A3:A1
Y
Y
Y
N
N
N
ASSERT
FLT
The RST signal can be used to reset either the SMBus
interface or the MAX8688 depending on the RST pulse
width. To reset the SMBus interface, the RST signal is
held low for t
thus flushing any pending PMBus commands or portion
of commands received thus far. None of the other
MAX8688 internal registers are affected by an SMBus
reset. If the host controller applies an active-low pulse
to RST for t
and repeats the initialization process.
To ensure a known and controlled POL power-up state,
the MAX8688 is factory-programmed to a specific
ENOUT initial power-up state. There are two types of
POLs—active-high enable or active-low enable. By
default, the MAX8688 assumes that the initial power-up
state is the off-state. To operate properly, the POL on-
state has to be configured. To configure the ENOUT
active state, use the MFR_MODE command ENOUT
Polarity Select.
The MAX8688 address can be assigned in one of the
three ways described below:
1) Hardwire by A3:A2:A1.
2) Restore from EEPROM.
3) By system controller using the MFR_SET_ADDRESS
Address assignment order is shown in Figure 10.
Table 2. ENOUT Active State
ENOUT DEFAULT
STARTUP STATE
command.
1 (High)
1 (High)
0 (Low)
0 (Low)
RST
SMB_RST
, the MAX8688 undergoes a device reset
MAX8688 Address Assignment
ENOUT POLARITY
. This resets the SMBus interface,
SELECT
0
1
0
1
ENOUT Operation
RST Operation
ENOUT ACTIVE
Active High
Active High
Active Low
Active Low
STATE