CAT5261YI-00 ON Semiconductor, CAT5261YI-00 Datasheet - Page 9

• Manufacturer Part Number: CAT5261YI-00
• Manufacturer: ON Semiconductor

Specifications of CAT5261YI-00

• Number Of Elements: 2
• # Of Taps: 256
• Resistance (max): 100KOhm
• Power Supply Requirement: Single
• Interface Type: Serial (SPI)
• 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: 24
• Package Type: TSSOP
• Lead Free Status / Rohs Status: Compliant

The basic sequence of the three byte instructions is
illustrated in Figure 8. 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
wiper position), to a Data Register is a write to non-
volatile memory and takes a minimum of t
complete. The transfer can occur between one of the
potentiometers and one of its associated registers; or
the transfer can occur between both potentiometers
and one associated register.
Four instructions require a two-byte sequence to
complete, as illustrated in Figure 7. These instructions
transfer data between the host/processor and the
CAT5261; either between the host and one of the data
registers or directly between the host and the Wiper
Control Register. These instructions are:
— XFR Data Register to Wiper Control Register
— XFR Wiper Control Register to Data Register
Figure 7. Two-Byte
Figure 8. Three-Byte Instruction Sequence
Figure 9. Increment/Decrement
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
This transfers the contents of one specified Data
Register to the associated Wiper Control Register.
This transfers the contents of the specified Wiper
Control Register to the specified associated Data
Register.
SI
SI
WRL
ID3 ID2 ID1 ID0
ID3 ID2 ID1 ID0
0
. A transfer from the WCR (current
0
Device ID
Device ID
1
1
Instruction
SI
0
0
1
1
A3
ID3 ID2 ID1 ID0
0
A3
0
0
A2
Device ID
Sequence
0
Internal
Address
Internal
Address
Instruction
1
A2 A1 A0
0
A1
0
A0
1
I3
A3
0
I3
Instruction
Opcode
Sequence
A2
I2
0
Internal
Address
WR
Instruction
Opcode
I2
A1
I1 I0
to
I1
A0
9
I0
I3
R1 R0
Data
Register
Address
— Global XFR Data Register to Wiper Control
— Global XFR Wiper Counter Register to Data
INCREMENT/DECREMENT COMMAND
The final command is Increment/Decrement (Figure 9
and 10). The Increment/Decrement command is differ-
ent from the other commands. Once the command is
issued 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 SCK
clock pulse (t
will move one resistor segment towards the R
terminal. Similarly, for each SCK clock pulse while SI
is LOW, the selected wiper will move one resistor
segment towards the R
See Instructions format for more detail.
Instruction
Data
Register
Address
R1
Opcode
I2
Register
This transfers the contents of all specified Data
Registers to the associated Wiper Control
Registers.
Register
This transfers the contents of all Wiper Control
Registers to the specified associated Data
Registers.
R0 P1 P0
I1
Address
P1 P0
Pot/WCR
I0
Pot/WCR
Address
Register
Address
R1 R0 P1
D7 D6 D5 D4 D3 D2 D1 D0
HIGH
N
C
1
I
) while SI is HIGH, the selected wiper
Data Register D[7:0]
N
C
2
I
Pot/WCR
Address
WCR[7:0]
P0
L
terminal.
or
N
C
n
I
D
C
E
1
D
E
C
n
Doc. No. MD-2122 Rev. G
CAT5261
H