MCP4561-103E/MS Microchip Technology, MCP4561-103E/MS Datasheet - Page 64

• Manufacturer Part Number: MCP4561-103E/MS
• Description: IC POT DGTL 10K 257TAPS 8-MSOP
• Manufacturer: Microchip Technology

Specifications of MCP4561-103E/MS

• Taps: 257
• Resistance (ohms): 10K
• Number Of Circuits: 1
• 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
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Resistance In Ohms: 10K
• End To End Resistance: 100kohm
• Track Taper: Linear
• Resistance Tolerance: ± 20%
• No. Of Steps: 256
• Supply Voltage Range: 2.7V To 5.5V
• Control Interface: I2C, Serial
• No. Of Pots: Single
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MCP454X/456X/464X/466X
7.7
The Decrement Command provide a quick and easy
method to modify the potentiometer’s wiper by -1 with
minimal overhead. The Decrement Command will only
function on the volatile wiper setting memory locations
00h and 01h. Decrement Commands to Non-Volatile
addresses will be ignored and will generate an A bit.
When executing a Decrement Command, the volatile
wiper setting will be altered from n to n-1 for each
Decrement Command received. The value will
decrement down to 000h min. If multiple Decrement
Commands are received after the value has reached
000h, the value will not be decremented further.
Table 7-5
current volatile wiper value.
The Decrement 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 7-8:
DS22107A-page 64
Note:
Note:
S
Decrement Wiper
Normal and High Voltage
Note 1:
0 1 0
shows the Increment Command versus the
Figure 7-8
Fixed
Address
Table 7-2
the Decrement 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 non-volatile
location will cause an error condition (A
will be generated).
2:
Control Byte
specified
Decrement Command (DECR) only functions when accessing the volatile wiper
registers (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 (INCR, Read, or Write).
1
shows the valid addresses for
for the Decrement Command
I
2
A2 A1 A0 0
C Decrement Command Sequence.
Variable
Address
address.
Write bit
A
Issuing
AD AD AD AD
3
Device
Memory
Address Command
2
DECR Command (n-1)
1
an
0
1
0 X X A
The advantage of using an Decrement 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 7-5:
7.7.1
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 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
081h
080h
07Fh
041h
040h
03Fh
001h
000h
7-bit
Note:
Pot
Setting
AD AD AD AD
3FFh
101h
0FFh
080h
07Fh
8-bit
100h
000h
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
Pot
081
001
3
DECR Command (n-2)
DECREMENT 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) No
2
1
Properties
Wiper (W)
© 2008 Microchip Technology Inc.
1
DD
IHH
0 X X A P
signal.
level to the 1st edge
IHH
(~8.5V) on the
Yes
No
Yes
Decrement
Operates?
Command
(2)