X9409 – Preliminary Information
Characteristics subject to change without notice.
10 of 21
REV 1.6 1/30/03
www.xicor.com
Increment/Decrement Wiper Counter Register (WCR)
S
T
A
R
T
Global Transfer Data Register (DR) to Wiper Counter Register (WCR)
S
T
A
R
T
Global Transfer Wiper Counter Register (WCR) to Data Register (DR)
S
T
A
R
T
device type
identifier
device
addresses
S
A
C
K
instruction
opcode
WCR
addresses
S
A
C
K
increment/decrement
(sent by master on SDA)
S
T
O
P
0
1
0
1
A
3
A
2
A
1
A
0
0
0
1
0
0
0
P
1
P
0
I/
D
I/
D
.
.
.
.
I/
D
I/
D
device type
identifier
device
addresses
S
A
C
K
instruction
opcode
DR
addresses
S
A
C
K
S
T
O
P
0
1
0
1
A
3
A
2
A
1
A
0
0
0
0
1
R
1
R
0
0
0
device type
identifier
device
addresses
S
A
C
K
instruction
opcode
DR
addresses
S
A
C
K
S
T
O
P
HIGH-VOLTAGE
WRITE CYCLE
0
1
0
1
A
3
A
2
A
1
A
0
1
0
0
0
R
1
R
0
0
0
SYMBOL TABLE
Guidelines for Calculating Typical Values of Bus
Pull-Up Resistors
WAVEFORM
INPUTS
OUTPUTS
Must be
steady
Will be
steady
May change
from Low to
High
May change
from High to
Low
Will change
from Low to
High
Will change
from High to
Low
Don’t Care:
Changes
Allowed
N/A
Changing:
State Not
Known
Center Line
is High
Impedance
120
100
80
40
60
20
20
40
60
80 100 120
0
0
R
Bus Capacitance (pF)
Min.
Resistance
Max.
Resistance
R
MAX
=C
BUS
t
R
R
MIN
=I
OL MIN
V
CC MAX
=1.8K