7 OSCILLATOR CIRCUIT (OSC)
S1C17001 TECHNICAL MANUAL
EPSON
67
0x5062: Noise Filter Enable Register (OSC_NFEN)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
Noise Filter
Enable Register
(OSC_NFEN)
0x5062
(8 bits)
D7–2
–
reserved
–
–
–
0 when being read.
D1
RSTFE
Reset noise filter enable
1 Enable
0 Disable
1
R/W
D0
NMIFE
NMI noise filter enable
1 Enable
0 Disable
1
R/W
D1
RSTFE: Reset Noise Filter Enable Bit
Enables or disables the RESET input noise filter.
1 (R/W): Enabled (noise filtering) (default)
0
(R/W):
Disabled
(bypass)
This noise filter inputs only RESET pulses of not less than 16 cycles of the system clock (OSC3 or
OSC1 clock) to the S1C17 core. Pulses having widths of less than 16 cycles are filtered out as noise.
This should normally be enabled.
D0
NMIFE: NMI Noise Filter Enable Bit
Enables or disables the NMI input noise filter.
1 (R/W): Enabled (noise filtering) (default)
0
(R/W):
Disabled
(bypass)
This noise filter inputs only NMI pulses of not less than 16 cycles of the system clock (OSC3 or OSC1
clock) to the S1C17 core. Pulses having widths of less than 16 cycles are filtered out as noise. This
should normally be enabled.
Note: The S1C17001 does not feature external NMI input pins, but the watchdog timer NMI request
signal passes through these filters.
Summary of Contents for S1C17001
Page 1: ...Technical Manual S1C17001 CMOS 16 BIT SINGLE CHIP MICROCONTROLLER ...
Page 33: ...4 POWER SUPPLY VOLTAGE 24 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Page 63: ...6 INITERRUPT CONTROLLER 54 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Page 87: ...8 CLOCK GENERATOR CLG 78 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Page 91: ...9 PRESCALER PSC 82 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Page 133: ...11 16 BIT TIMER T16 124 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Page 211: ...16 STOPWATCH TIMER SWT 202 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Page 219: ...17 WATCHDOG TIMER WDT 210 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Page 241: ...18 UART 232 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Page 277: ...20 I2 C 268 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Page 313: ...25 PACKAGE 304 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...