X9429_08 Datasheet, PDF (11/20 Pages) Intersil Corporation – Single Digitally Controlled Potentiometer(XDCP™)

X9429
XFR Data Register (DR) to Wiper Counter Register (WCR)
S ^DEVICE
T
TYPE
DEVICE _S INSTRUCTION REGISTER _{S S}
A ^{IDENTIFIER ADDRESSES} A ^{OPCODE ADDRESSES} A T
R 0 1 0 1 A A 0 AC 1 1 0 1 R R 0 0 CO
T
32
0K
10
KP
XFR Wiper Counter Register (WCR) to Data Register (DR)
S ^DEVICE
T
TYPE
DEVICE _S INSTRUCTION REGISTER _{S S}
A ^{IDENTIFIER ADDRESSES} A ^{OPCODE ADDRESSES} A T
R 0 1 0 1 AA 0 AC 1 1 1 0 RR 0 0 CO
T
32
0K
10
KP
HIGH-VOLTAGE
WRITE CYCLE
Increment/Decrement Wiper Counter Register (WCR)
S DEVICE TYPE
DEVICE
INSTRUCTION
INCREMENT/DECREMENT
T IDENTIFIER ADDRESSES S
OPCODE
S (SENT BY MASTER ON SDA) S
A _{0 1 0 1 A3 A2 0 A0} A _{0 0 1 0 0 0 0 0} A _{I/ I/ . . . . I/ I/} T
R
C
C_{D D}
D D^O
T
K
K
P
Symbol Table
WAVEFORM
INPUTS
OUTPUTS
MUST BE
STEADY
WILL BE
STEADY
MAY CHANGE WILL CHANGE
FROM LOW TO FROM LOW TO
HIGH
HIGH
MAY CHANGE WILL CHANGE
FROM HIGH TO FROM HIGH TO
LOW
LOW
DON’T CARE:
CHANGES
ALLOWED
N/A
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 MAX}
I_{OL MIN}
=1.8kW
80
R_MAX
=
T_R
C_BUS
60
MAX.
RESISTANCE
40
20 _MIN.
RESISTANCE
0
0 20 40 60
80 100 120
BUS CAPACITANCE (PF)
11
FN8248.3
October 13, 2008