MPR081EJ FREESCALE [Freescale Semiconductor, Inc], MPR081EJ Datasheet - Page 15

• Manufacturer Part Number: MPR081EJ
• Description: Touch Pad Controller
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Sensors
Freescale Semiconductor
Table 19. Configuration Register Format
MPR081 is in shutdown, and will not scan the rotary.
Note that FIFO contents are not cleared when entering shutdown
and can be read any time during shutdown.
MPR081 is operating, scanning the rotary, with IRQ interrupt
output disabled. Poll the FIFO register 0x00 and/or the Current
Rotary register 0x02 to determine current rotary status.
Note that FIFO contents are cleared before exiting shutdown
MPR081 is operating, scanning the rotary, with IRQ interrupt
output enabled. IRQ behavior is controlled by Interrupt Rate bits
D5-D7, and is asserted on the first entry into the FIFO from
empty.
Note that FIFO contents are cleared before exiting shutdown
MPR081 will go into low power sleep mode after an idle period
timeout. While in low power sleep mode, device cannot be
addressed via I
MPR081 will remain awake and can be addressed at anytime via
I
System reset asserted. MPR081 can be addressed via I
anytime.
System reset de-asserted. MPR081 can be addressed via I
anytime.
IRQ interrupt is immediate when FIFO changes from empty
IRQ interrupt asserts no sooner than 4 master tick periods after
the last IRQ rise
IRQ interrupt asserts no sooner than 12 master tick periods after
the last IRQ rise
IRQ interrupt asserts no sooner than 20 master tick periods after
the last IRQ rise
IRQ interrupt asserts no sooner than 28 master tick periods after
the last IRQ rise
IRQ interrupt asserts no sooner than 36 master tick periods after
the last IRQ rise
IRQ interrupt asserts no sooner than 44 master tick periods after
the last IRQ rise
IRQ interrupt asserts no sooner than 52 master tick periods after
the last IRQ rise
2
C.
2
C except by asserting the wake pin.
Write Configuration Register
Read Configuration Register
Register
2
C at
2
C at
R/W
1
0
X
Register
Address
0x09
D7
Interrupt Rate
X
X
X
X
X
X
X
0
0
0
0
1
1
1
1
D6
X
X
X
X
X
X
X
0
0
1
1
0
0
1
1
D5
X
X
X
X
X
X
X
0
1
0
1
0
1
0
1
RESET N/A WAKE IRQEN RUN
D4
Register Data
1
1
1
1
1
0
1
1
1
1
1
1
1
1
1
D3
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
D2
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
D1
X
0
1
1
1
1
1
1
1
1
1
1
1
1
1
MPR081
D0
X
X
0
1
1
1
1
1
1
1
1
1
1
1
1
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