X9258_14 Datasheet, PDF (10/19 Pages) Intersil Corporation – Quad Digital Controlled Potentiometers

X9258
XFR Data Register (DR) to Wiper Counter Register (WCR)
S DEVICE
T
TYPE
DEVICE S INSTRUCTION DR AND WCR S S
A IDENTIFIER ADDRESSES A OPCODE
ADDRESSES A T
R
C
CO
T ^{0 1 0 1 A3 A2 A1 A0} K ^{1 1 0 1 R1 R0 P1 P0} K P
XFR Wiper Counter Register (WCR) to Data Register (DR)
S DEVICE
T
TYPE
DEVICE S INSTRUCTION DR AND WCR S S
A IDENTIFIER ADDRESSES A OPCODE
ADDRESSES A T
R
C
CO
T ^{0 1 0 1 A3 A2 A1 A0} K ^{1 1 1 0 R1 R0 P1 P0} K P
HIGH-VOLTAGE
WRITE CYCLE
Increment/Decrement Wiper Counter Register (WCR)
S DEVICE TYPE DEVICE
T IDENTIFIER ADDRESSES S
A
A
R ^{0 1 0 1 A3 A2 A1 A0} C
T
K
INSTRUCTION
OPCODE
0010
WCR
ADDRESSES
0 0 P1 P0
INCREMENT/DECREMENT
S (SENT BY MASTER ON SDA) S
A
T
C ^{I/D I/D . . . . I/D I/D} O
K
P
Global XFR Data Register (DR) to Wiper Counter Register (WCR)
S DEVICE TYPE DEVICE
INSTRUCTION
DR
T IDENTIFIER ADDRESSES S OPCODE ADDRESSES S S
A
A
AT
R ^{0 1 0 1 A3 A2 A1 A0} C ^{0 0 0 1 R1 R0 0 0} C O
T
K
KP
Global XFR Wiper Counter Register (WCR) to Data Register (DR)
S DEVICE
T
TYPE
DEVICE S INSTRUCTION
DR
SS
A IDENTIFIER ADDRESSES A OPCODE ADDRESSES A T
R
C
CO
T ^{0 1 0 1 A3 A2 A1 A0} K ^{1 0 0 0 R1 R0 0 0} K P
HIGH-VOLTAGE
WRITE CYCLE
Symbol Table
WAVEFORM INPUTS
OUTPUTS
Must be
steady
May change
from Low to
High
May change
from High to
Low
Don’t Care:
Changes
Allowed
N/A
Will be
steady
Will change
from Low to
High
Will change
from High to
Low
Changing:
State Not
Known
Center Line
is High
Impedance
Guidelines for Calculating Typical Values of Bus
Pull-Up Resistors
120
100
R_MIN
=
V_CC
IOL
MAX
MIN
=1.8kΩ
80
R_MAX =
t_R
C_BUS
60
MAXIMUM
RESISTANCE
40
20 _MINIMUM
RESISTANCE
0
0
20
40
60
80 100 120
BUS CAPACITANCE (pF)
10
FN8168.6
December 15, 2011