X9261 Datasheet, PDF (11/21 Pages) Intersil Corporation – Single Supply/Low Power/256-Tap/SPI Bus

X9261
Table 5. Instruction Set
Instruction Set
Instruction
I3 I2 I1 I0 RB RA 0 P0
Operation
Read Wiper Counter
Register
10010 0
0 1/0 Read the contents of the Wiper Counter
Register pointed to by P0
Write Wiper Counter
Register
10100 0
0 1/0 Write new value to the Wiper Counter
Register pointed to by P0
Read Data Register
1 0 1 1 1/0 1/0 0 1/0 Read the contents of the Data Register
pointed to by P0 and RB - RA
Write Data Register
1 1 0 0 1/0 1/0 0 1/0 Write new value to the Data Register
pointed to by P0 and RB - RA
XFR Data Register to
Wiper Counter Register
1 1 0 1 1/0 1/0 0 1/0 Transfer the contents of the Data Register
pointed to by P0 and RB - RA to its
associated Wiper Counter Register
XFR Wiper Counter
Register to Data Register
1 1 1 0 1/0 1/0 0 1/0 Transfer the contents of the Wiper Counter
Register pointed to by P0 to the Data
Register pointed to by RB - RA
Global XFR Data Registers 0 0 0 1 1/0 1/0 0
to Wiper Counter Registers
0 Transfer the contents of the Data Registers
pointed to by RB - RA of all four pots to their
respective Wiper Counter Registers
Global XFR Wiper Counter 1 0 0 0 1/0 1/0 0
Registers to Data Register
0 Transfer the contents of both Wiper Counter
Registers to their respective data Registers
pointed to by RB - RA of all four pots
Increment/Decrement
Wiper Counter Register
00100 0
0 1/0 Enable Increment/decrement of the Control
Latch pointed to by P0
Note: 1/0 = data is one or zero
INSTRUCTION FORMAT
Read Wiper Counter Register (WCR)
CS
Falling
Edge
Device Type
Identifier
0101
Device
Addresses
0 0 A1 A0
Instruction
Opcode
1001
WCR
Wiper Position
Addresses (Sent by X9261 on SO)
CS
W ^W W W W W W W _Rising
0
0
0
P0
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
R
Edge
76543210
Write Wiper Counter Register (WCR)
CS
Falling
Edge
Device Type
Identifier
0101
Device
Addresses
0 0 A1 A0
Instruction
Opcode
1010
WCR
Data Byte
Addresses (Sent by Host on SI)
CS
W ^W W W W W W W _Rising
0
0
0
P0
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
R
Edge
76543210
Read Data Register (DR)
Device Type Device
Instruction DR and WCR
Data Byte
CS
Falling
Edge
Identifier
0101
Addresses
0 0 A1 A0
Opcode
1011
Addresses
RB RA 0 P0
(Sent by X9271 on SO)
DDDDDDDD
76543210
CS
Rising
Edge
11
FN8171.2
September 14, 2005