MAX16047ETN+W Maxim Integrated, MAX16047ETN+W Datasheet - Page 45

• Manufacturer Part Number: MAX16047ETN+W
• Description: Supervisory Circuits 12-Channel EEPROM-Programmable System Manager with Nonvolatile Fault Registers
• Manufacturer: Maxim Integrated
• Series: MAX16047, MAX16049r

Specifications of MAX16047ETN+W

• Number Of Voltages Monitored: 12
• Undervoltage Threshold: Adjustable
• Overvoltage Threshold: Adjustable
• Manual Reset: Resettable
• Watchdog: Watchdog
• Supply Voltage - Max: 14 V
• Maximum Power Dissipation: 3810 mW
• Supply Current (typ): 3800 uA
• Supply Voltage - Min: 3 V

The acknowledge bit (ACK) is the 9th bit attached to
any 8-bit data word. The receiving device always gen-
erates an ACK. The MAX16047/MAX16049 generate an
ACK when receiving an address or data by pulling SDA
low during the 9th clock period (Figure 11). When
transmitting data, such as when the master device
reads data back from the MAX16047/MAX16049, the
device waits for the master device to generate an ACK.
Monitoring ACK allows for detection of unsuccessful
data transfers. An unsuccessful data transfer occurs if
the receiving device is busy or if a system fault has
occurred. In the event of an unsuccessful data transfer,
the bus master should reattempt communication at a
later time. The MAX16047/MAX16049 generate a NACK
after the command byte is received during a software
reboot, while writing to the EEPROM, or when receiving
an illegal memory address.
Figure 11. Acknowledge
System Managers with Nonvolatile Fault Registers
TRANSMITTER
RECEIVER
SDA BY
SDA BY
SCL
12-Channel/8-Channel EEPROM-Programmable
S
______________________________________________________________________________________
1
Acknowledge
2
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 25 for a listing of all possible 7-bit addresses.
Table 25. Setting the I
Address
X = Don’t care, R = Read/write select bit.
CLOCK PULSE FOR ACKNOWLEDGE
SDA
SCL
A0
0
1
8
2
C/SMBus Slave
SLAVE ADDRESS
1010 00XR
1010 01XR
1010 10XR
1010 11XR
NACK
ACK
Slave Address
9
45