MCP4641-503E/ST Microchip Technology, MCP4641-503E/ST Datasheet - Page 63

• Manufacturer Part Number: MCP4641-503E/ST
• Description: IC DGTL POT 50K 256TAPS 14-TSSOP
• Manufacturer: Microchip Technology

Specifications of MCP4641-503E/ST

• Package / Case: 14-TSSOP
• Taps: 129
• Resistance (ohms): 50K
• Number Of Circuits: 2
• Temperature Coefficient: 150 ppm/°C Typical
• 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
• Resistance In Ohms: 50K
• Number Of Pots: Dual
• Taps Per Pot: 128
• Resistance: 50 KOhms
• Wiper Memory: Non Volatile
• Digital Interface: Serial (2-Wire, I2C)
• Operating Supply Voltage: 2.5 V, 3.3 V, 5 V
• Supply Current: 2.5 uA
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.8 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

7.6
The Increment Command provide 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 and 01h. The Increment Command to Non-Volatile
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 Command received. The value will incre-
ment 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.
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
Non-Volatile wiper memory using a Write operation.
The MCP4XXX 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:
© 2008 Microchip Technology Inc.
Note:
Note:
S
Increment Wiper
Normal and High Voltage
Note 1:
0 1 0
Figure 7-7
Fixed
Address
Table 7-2
the Increment Wiper command. Other
addresses are invalid.
The command sequence can go from an
increment to any other valid command for
the specified address. Issuing an incre-
ment or decrement to a non-volatile loca-
tion will cause an error condition (A will be
generated).
2:
Control Byte
Increment Command (INCR) only functions when accessing the volatile wiper reg-
isters (AD3:AD0 = 0h and 1h).
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
A2 A1 A0 0
C Increment Command Sequence.
Variable
Address
Table 7-4
Write bit
A
AD AD AD AD
3
shows the
Device
Memory
Address
2
INCR Command (n+1)
MCP454X/456X/464X/466X
1
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 multi-
plexed 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 MCP45XX/46XX 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
MCP45XX/46XXs 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
THE HIGH VOLTAGE COMMAND
(HVC) SIGNAL
There is a required delay after the HVC pin
is driven to the V
of the SCL pin.
4
081
001
Pot
3
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
2
1
Properties
Wiper (W)
0
DD
IHH
1 x
signal.
level to the 1st edge
IHH
DS22107A-page 63
X A P
(~8.5V) on the
No
No
Yes
Command
Operates?
Increment
(2)