ISL22429 Datasheet, PDF (2/13 Pages) Intersil Corporation – Low Noise, Low Power, SPI Bus, 128 Taps, Wiper Only

Block Diagram
SCK
SDI
SDO
CS
SPI
INTERFACE
SHDN
ISL22449
V_CC
POWER UP
INTERFACE,
CONTROL
AND STATUS
LOGIC
NON-
VOLATILE
REGISTERS
V_CC
WR3
RW3
V_CC
WR2
RW2
V_CC
WR1
RW1
V_CC
WR0
RW0
Pin Descriptions
TSSOP PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SYMBOL
RW3
NC
SCK
SDO
GND
RW2
RW1
NC
CS
SDI
NC
VCC
SHDN
RW0
GND
“Wiper” terminal of DCP3
DESCRIPTION
SPI clock input
SPI open drain data output
Device ground pin and the RL connection for each DCP
“Wiper” terminal of DCP2
“Wiper” terminal of DCP1
SPI Chip Select active low input
SPI data input
Power supply pin and the RH connection for each DCP
Shutdown active low input
“Wiper” terminal of DCP0
2
FN6333.3
July 17, 2009