X9429 INTERSIL [Intersil Corporation], X9429 Datasheet - Page 6

• Manufacturer Part Number: X9429
• Manufacturer: INTERSIL [Intersil Corporation]

Four of the seven instructions end with the transmission of
the instruction byte. The basic sequence is illustrated in
Figure 3. These two-byte instructions exchange data
between the Wiper Counter Register and one of the Data
Registers. A transfer from a Data Register to a Wiper
Counter Register is essentially a write to a static RAM. The
response of the wiper to this action will be delayed t
transfer from the Wiper Counter Register (current wiper
position), to a Data Register is a write to non-volatile
memory and takes a minimum of t
Four instructions require a three-byte sequence to complete.
These instructions transfer data between the host and the
X9429; either between the host and one of the Data Registers
or directly between the host and the Wiper Counter Register.
These instructions are:
SCL
SDA
S
T
A
R
T
0
6
1
WR
0
to complete.
1
FIGURE 3. TWO-BYTE INSTRUCTION SEQUENCE
A3
A2
WRL
0
. A
A0
X9429
A
C
K
I3
Flow 1. ACK Polling Sequence
I2
COMMAND COMPLETED
NON-VOLATILE WRITE
ENTER ACK POLLING
I1
ISSUE SLAVE
OPERATION?
INSTRUCTION
RETURNED?
I0
ADDRESS
FURTHER
PROCEED
START
ISSUE
ISSUE
ACK
R1
YES
YES
R0
0
NO
NO
0
A
C
K
S
T
O
P
ISSUE STOP
ISSUE STOP
PROCEED
October 13, 2008
FN8248.3