MCP4441T-503E/ST Microchip Technology, MCP4441T-503E/ST Datasheet - Page 69

• Manufacturer Part Number: MCP4441T-503E/ST
• Description: IC DGTL POT 129TAPS QUAD 20TSSOP
• Manufacturer: Microchip Technology

Specifications of MCP4441T-503E/ST

• Package / Case: 20-TSSOP (0.173", 4.40mm Width)
• Temperature Coefficient: 150 ppm/°C Typical
• Taps: 129
• Resistance (ohms): 50K
• Number Of Circuits: 4
• Memory Type: Non-Volatile
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Number Of Pots: Quad
• Taps Per Pot: 129
• Resistance: 50 KOhms
• Wiper Memory: Non Volatile
• Buffered Wiper: Buffered
• Digital Interface: I2C
• Operating Supply Voltage: 2.7 V to 5.5 V
• Supply Current: 600 uA
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Description/function: Quad I2C Digital POT with Nonvolatile Memory
• Mounting Style: SMD/SMT
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.6
The Increment Command provides a quick and easy
method to modify the potentiometer’s wiper by +1 with
minimal overhead. The Increment Command will only
function on the volatile wiper setting memory locations
00h, 01h, 06h and 07h. The Increment Command to
Nonvolatile addresses will be ignored and will generate
a A.
When executing an Increment Command, the volatile
wiper setting will be altered from n to n+1 for each
Increment
increment up to 100h max on 8-bit devices and 80h on
7-bit devices. If multiple Increment Commands are
received after the value has reached 100h (or 80h), the
value will not be incremented further.
the Increment Command versus the current volatile
wiper value.
The Increment Command will most commonly be
performed on the Volatile Wiper locations until a
desired condition is met. The value in the Volatile Wiper
register would need to be read using a Read operation
in order to write the new setting to the corresponding
Nonvolatile wiper memory using a Write operation. The
MCP44XX is responsible for generating the A bits.
Refer to
sequence. The sequence is terminated by the Stop
condition. So when executing a continuous command
string, the Increment command can be followed by any
other valid command. This means that writes do not
need to be to the same volatile memory address.
FIGURE 7-7:
© 2010 Microchip Technology Inc.
Note:
Note:
S
Increment Wiper
Normal and High Voltage
Note1: Increment Command (INCR) only functions when accessing the volatile wiper
0 1 0
Figure 7-7
Fixed
Address
Table 7-4
the Increment Wiper command. Other
addresses are invalid.
The command sequence can go from an
increment to any other valid command for
the
increment or decrement to a nonvolatile
location will cause an error condition (A
will be generated).
Command
2:
Control Byte
specified
registers (AD3:AD0 = 00h, 01h, 06h, and 07h).
This command sequence does not need to terminate (using the Stop bit) and can
change to any other desired command sequence (Increment, Read, or Write).
1
shows the valid addresses for
I
for the Increment Command
2
1 A1 A0 0
C Increment Command Sequence.
received.
Variable
Address
address.
Write bit
The
Table 7-4
A
Issuing
AD AD AD AD
3
value
Device
Memory
Address
2
INCR Command (n+1)
shows
1
will
an
0
Command
0
1 x
The advantage of using an Increment Command
instead of a read-modify-write series of commands is
speed and simplicity. The wiper will transition after each
Command Acknowledge when accessing the volatile
wiper registers.
TABLE 7-4:
7.6.1
The High Voltage Command (HVC) signal is
multiplexed with Address 0 (A0) and is used to indicate
that the command, or sequence of commands, are in
the High Voltage mode. Signals > V
HVC/A0 pin puts MCP44XX devices into High Voltage
mode. High Voltage commands allow the device’s
WiperLock Technology and write protect features to be
enabled and disabled.
The HVC pin has an internal resistor connection to the
MCP44XX’s internal V
Current Wiper
3FFh
07Fh
03Fh
081h
080h
041h
040h
001h
000h
Note:
7-bit
Pot
X A
Setting
AD AD AD AD
3FFh
0FFh
101h
100h
080h
07Fh
000h
8-bit
4
THE HIGH VOLTAGE COMMAND
(HVC) SIGNAL
There is a required delay after the HVC pin
is driven to the V
of the SCL pin.
081
001
Pot
MCP444X/446X
3 2
INCR Command (n+2)
INCREMENT OPERATION VS.
VOLATILE WIPER VALUE
Reserved
(Full-Scale (W = A))
Full-Scale (W = A)
W = N
W = N (Mid-Scale)
W = N
Zero Scale (W = B) Yes
DD
1
Properties
Wiper (W)
signal.
0
IHH
1 x
level to the 1st edge
IHH
DS22265A-page 69
X A P
(~8.5V) on the
No
No
Yes
Command
Operates?
Increment
(2)