MCP79410-I/SN Microchip Technology, MCP79410-I/SN Datasheet - Page 9

• Manufacturer Part Number: MCP79410-I/SN
• Description: IC RTC/CALENDER 8SOIC
• Manufacturer: Microchip Technology
• Type: Clock/Calendar/EEPROMr

Specifications of MCP79410-I/SN

• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Memory Size: 1K (128 x 8)
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Function: Clock/Calendar
• Rtc Memory Size: 64 B
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.8 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: I2C
• Supply Current: 400 uA
• Clock Format: HH
• Clock Ic Type: RTC
• Ic Interface Type: I2C
• Memory Configuration: 128 X 8
• Supply Voltage Range: 1.8V To 5.5V
• Digital Ic Case Style: SOIC
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, 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