mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 377

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

16.3.11 LLWU Reset Enable Register (LLWU_RST)
LLWU_RST is a control register that is used to enable/disable the digital filter for the
external pin detect and RESET pin.
Address: LLWU_RST is FFFF_80B0h base + Ah offset = FFFF_80BAh
Freescale Semiconductor, Inc.
Reserved
FILTSEL
FILTE
FILTF
Field
Reset
6–5
3–0
Read
Write
7
4
Bit
This register is reset on Chip Reset not VLLS and by reset
types that trigger Chip Reset not VLLS. It is unaffected by reset
types that do not trigger Chip Reset not VLLS. See the
details for more information.
Filter Detect Flag
Indicates that the filtered external wakeup pin, selected by FILTSEL, was a source of exiting a low-
leakage power mode. To clear the flag write a one to FILTF.
0
1
Digital Filter on External Pin
Controls the digital filter options for the external pin detect.
00
01
10
11
This read-only bit is reserved and always has the value zero.
Filter pin select
Selects 1 out of the 16 wakeup pins to be muxed into the filter.
0000
...
1111
7
0
Pin Filter 2 was not a wakeup source
Pin Filter 2 was a wakeup source
Filter disabled
Filter posedge detect enabled
Filter negedge detect enabled
Filter any edge detect enabled
Select LLWU_P0 for filter
...
Select LLWU_P15 for filter
0
6
MCF51JF128 Reference Manual, Rev. 2, 03/2011
LLWU_FILT2 field descriptions
0
5
0
Preliminary
NOTE
0
4
Description
0
3
Chapter 16 Low Leakage Wakeup Unit (LLWU)
0
2
Reset
LLRSTE
1
1
RSTFILT
0
0
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