CAT5241YI-00 ON Semiconductor, CAT5241YI-00 Datasheet - Page 11

• Manufacturer Part Number: CAT5241YI-00
• Manufacturer: ON Semiconductor

Specifications of CAT5241YI-00

• Number Of Elements: 4
• # Of Taps: 64
• Resistance (max): 100KOhm
• Power Supply Requirement: Single
• Interface Type: Serial (2-Wire/I2C)
• Single Supply Voltage (typ): 3.3/5V
• Dual Supply Voltage (typ): Not RequiredV
• Single Supply Voltage (min): 2.5V
• Single Supply Voltage (max): 6V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 20
• Package Type: TSSOP
• Lead Free Status / RoHS Status: Compliant

illustrated in Figure 11. These three−byte instructions
exchange data between the WCR and one of the Data
Registers. The WCR controls the position of the wiper. The
response of the wiper to this action will be delayed by t
A transfer from the WCR (current wiper position), to a Data
Register is a write to non−volatile memory and takes a
maximum of t
between one of the four potentiometers and one of its
associated registers; or the transfer can occur between all
potentiometers and one associated register.
complete, as illustrated in Figure 10. These instructions
transfer data between the host/processor and the CAT5241;
either between the host and one of the data registers or
directly between the host and the Wiper Control Register.
These instructions are:
•
•
The basic sequence of the three byte instructions is
Four instructions require a two−byte sequence to
SDA
XFR Data Register to Wiper Control Register
This transfers the contents of one specified Data
Register to the associated Wiper Control Register.
XFR Wiper Control Register to Data Register
This transfers the contents of the specified Wiper
Control Register to the specified associated Data
Register.
SDA
R
S
T
A
T
S
A
R
T
T
ID3 ID2 ID1 ID0
ID3 ID2 ID1 ID0
0
0
Device ID
WR
Device ID
1
1
to complete. The transfer can occur
SDA
0
0
1
1
R
S
T
A
T
A3
A3
ID3
0
A2 A1 A0 A
Address
Internal
Figure 12. Increment/Decrement Instruction Sequence
Device ID
Address
Internal
A2 A1 A0
ID2
1
Figure 11. Three−Byte Instruction Sequence
ID1 ID0
0
Figure 10. Two−Byte Instruction Sequence
1
C
K
A3
A
C
K
I3
Address
A2
Internal
I3
Instruction
Opcode
I2 I1 I0
http://onsemi.com
WRL
Instruction
A1
Opcode
I2
A0
.
I1
11
Pot/WCR
C
A
K
Address
I0
P1 P0
•
•
Increment/Decrement Command
and 12). The Increment/Decrement command is different
from the other commands. Once the command is issued and
the CAT5241 has responded with an acknowledge, the
master can clock the selected wiper up and/or down in one
segment steps; thereby providing a fine tuning capability to
the host. For each SCL clock pulse (t
HIGH, the selected wiper will move one resistor segment
towards the R
pulse while SDA is LOW, the selected wiper will move one
resistor segment towards the R
I3
Pot/WCR
Address
The final command is Increment/Decrement (Figures 6
See Instructions format for more detail.
Instruction
P1
Global XFR Data Register to Wiper Control
Register
This transfers the contents of all specified Data Registers
to the associated Wiper Control Registers.
Global XFR Wiper Counter Register to Data
Register
This transfers the contents of all Wiper Control Registers
to the specified associated Data Registers.
Opcode
I2
R1 R0 A
Register
Address
P0 R1 R0
Data
I1
Register
Address
I0 P1 P0
Data
Pot/WCR
C
Address
K
H
terminal. Similarly, for each SCL clock
D7 D6 D5 D4 D3 D2 D1 D0
A
C
K
N
C
1
I
R1
Register
Address
Data Register D[7:0]
R0
N
C
2
I
WCR[7:0]
L
A
C
K
or
terminal.
N
C
n
I
O
S
T
P
HIGH
D
E
C
1
) while SDA is
D
C
E
n
C
A
K
S
O
P
T
S
O
P
T