MCP98242T-BE/MNYBAA Microchip Technology, MCP98242T-BE/MNYBAA Datasheet - Page 32

• Manufacturer Part Number: MCP98242T-BE/MNYBAA
• Description: JEDEC DIMM Serial Output Temp Sensor + SPD EEPROM 8 TDFN 2x3x0.8mm T/R
• Manufacturer: Microchip Technology

Specifications of MCP98242T-BE/MNYBAA

• Function: Temp Monitoring System (Sensor)
• Topology: ADC (Sigma Delta), Register Bank
• Sensor Type: Internal
• Sensing Temperature: -40°C ~ 125°C
• Output Type: I²C™/SMBus™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-TDFN
• Full Temp Accuracy: +/- 2 C
• Digital Output - Bus Interface: Serial (2-Wire, I2C)
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MCP98242T-BE/MNYBAATR

MCP98242
5.3.3
The MCP98242 has a Software Write-Protect (SWP)
feature that allows the lower half array (addresses
00h - 7Fh) to be write-protected or permanently
write-protected (PWP). The write-protected area can
be cleared by sending Clear Write-Protect (CWP)
command. However, once the PWP is executed the
protected memory can not be cleared. The device will
not respond to the CWP command.
TABLE 5-3:
TABLE 5-4:
DS21996D-page 32
Note:
Note:
Permanently
Protected
Protected
Protected
Status
PWP (Note)
SWP
EEPROM
with
Not
SWP
CWP
WRITE PROTECTION
X is defined as ‘don’t care’.
The address pins are ‘X’ or don’t cares. However, the slave address bits need to match the address pins.
WRITE-PROTECT DEVICE ADDRESSING
DEVICE RESPONSE WHEN WRITING DATA OR ACCESSING SWP/CWP/PWP
Page/byte write lower 128 bytes
Page/byte write lower 128 bytes
SWP/CWP/PWP
SWP/CWP/PWP
Page/byte write
Operation
Command
WRITE
WRITE
WRITE
READ
READ
READ
SWP
CWP
PWP
GND GND V
GND
A2
X
Address Pins
V
A1
NoACK
NoACK
X
DD
ACK
ACK
ACK
ACK
ACK
ACK
ACK
V
HI_A0
HI_A0
A0
X
To access write protection, the device address code of
the Address Byte is set to ‘0110’ instead of ‘1010’.
The ‘1010’ Address code is used to access the mem-
ory area and the ‘0110’ address code is used to
access the write protection. Once the device is write-
protected it will not acknowledge certain commands.
Table 5-3
the write-protect feature.
Address
Address
Address
Address
X
X
X
X
X
Address Code
shows the corresponding Address Bytes for
0110
0110
0110
NoACK
NoACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
Data Byte
Address Byte
Data
Data
Data
 2010 Microchip Technology Inc.
A2
X
X
X
X
X
Slave Address
0
0
X
A1
0
1
X
NoACK
NoACK
NoACK
NoACK
ACK
ACK
ACK
ACK
ACK
A0
1
1
X
Write Cycle
Yes
Yes
Yes
Yes
No
No
No
No
R/W
0
1
0
1
0
1