MCP79411-I/MS Microchip Technology, MCP79411-I/MS Datasheet - Page 9

• Manufacturer Part Number: MCP79411-I/MS
• Description: IC RTCC I2C SER EUI-48 8MSOP
• Manufacturer: Microchip Technology
• Type: Clock/Calendarr

Specifications of MCP79411-I/MS

• Date Format: YY-MM-DD-dd
• Memory Size: 1K (128 x 8)
• Time Format: HH:MM:SS (12/24 hr)
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-TSSOP (0.118", 3.00mm Width)
• Function: Clock/Calendar
• Rtc Memory Size: 64 Byte
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Rtc Bus Interface: I2C
• Supply Current: 1 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3.1.3
Since the device will not acknowledge an EEPROM
command during an EEPROM write cycle, this can be
used to determine when the cycle is complete. This
feature can be used to maximize bus throughput. Once
the Stop condition for a write command has been
issued from the master, the device initiates the
internally timed write cycle. ACK polling can be initiated
immediately. This involves the master sending a Start
condition, followed by the control byte for a write
command (R/W = 0). If the device is still busy with the
write cycle, then no ACK will be returned. If no ACK is
returned, then the Start bit and control byte must be
resent. If the cycle is complete, then the device will
return the ACK, and the master can then proceed with
the next read or write command. See
flow diagram.
FIGURE 3-4:
 2010 Microchip Technology Inc.
ACKNOWLEDGE POLLING
Initiate EE Write Cycle
EE Write Command
Send Control Byte
with R/W = 0
Condition to
Acknowledge
Send Stop
Send Start
Did Device
(ACK = 0)?
Operation
ACKNOWLEDGE
POLLING FLOW
Send
Next
YES
Figure 3-4
NO
for the
Preliminary
MCP7941X
DS22266A-page 9