CY28404 Cypress Semiconductor, CY28404 Datasheet - Page 9

• Manufacturer Part Number: CY28404
• Description: CK409-COMPLIANT CLOCK SYNTHESIZER
• Manufacturer: Cypress Semiconductor

Document #: 38-07510 Rev. *B
Byte 11: Control Register 11
Byte 12: Control Register 12
Byte 13: Control Register 13
Byte 14: Control Register 14
Bit
Bit
Bit
Bit
1
1
1
7
6
5
4
3
2
0
7
6
5
4
3
2
0
7
6
5
4
3
2
0
7
6
5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
@Pup
@Pup
@Pup
@Pup
0
0
0
0
0
0
0
0
0
0
Reserved
Recovery_Frequency
Watchdog Time Stamp
Reload
WD_Alarm
WD_TIMER3
WD_TIMER2
WD_TIMER1
WD_TIMER0
CPU_FSEL_N8
CPU_FSEL_N7
CPU_FSEL_N6
CPU_FSEL_N5
CPU_FSEL_N4
CPU_FSEL_N3
CPU_FSEL_N2
CPU_FSEL_N1
FS_(E:A)
Reserved
Reserved
CPU_FSEL_N0
CPU_FSEL_M6
CPU_FSEL_M5
CPU_FSEL_M4
CPU_FSEL_M3
CPU_FSEL_M2
CPU_FSEL_M1
CPU_FSEL_M0
Name
Name
Name
Name
Reserved, set = 0
This bit allows selection of the frequency setting that the clock will be
restored to once the system is rebooted
0: Use Hardware settings
1: Use Last SW table Programmed values
To enable this function the register bit must first be set to “0” before toggling
to “1”.
0: Do not reload
1: Reset timer but continue to count.
This bit is set to “1” when the Watchdog times out. It is reset to “0” when
the system clears the WD_TIMER time stamp
Watchdog timer time stamp selection:
0000: Off
0001: 2 second
0010: 4 seconds
0011: 6 seconds
.
.
.
1110: 28 seconds
1111: 30 seconds
If Prog_Freq_EN is set, the values programmed in CPU_FSEL_N[8:0] and
CPU_FSEL_M[6:0] will be used to determine the CPU output frequency.
The setting of FS_Override bit determines the frequency ratio for CPU and
other output clocks. When it is cleared, the same frequency ratio stated in
the Latched FS[E:A] register will be used. When it is set, the frequency
ratio stated in the SEL[4:0] register will be used.
If Prog_Freq_EN is set, the values programmed in CPU_FSEL_N[8:0] and
CPU_FSEL_M[6:0] will be used to determine the CPU output frequency.
The setting of FS_Override bit determines the frequency ratio for CPU and
other output clocks. When it is cleared, the same frequency ratio stated in
the Latched FS[E:A] register will be used. When it is set, the frequency
ratio stated in the SEL[4:0] register will be used.
FS_Override
0 = Select operating frequency by FS(E:A) input pins
1 = Select operating frequency by FSEL(4:0) settings
Reserved, set = 0
Reserved, set = 0
Description
Description
Description
Description
CY28404
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