CY28439 SpectraLinear, CY28439 Datasheet - Page 9

• Manufacturer Part Number: CY28439
• Description: Clock Generator
• Manufacturer: SpectraLinear

Rev 1.0, November 21, 2006
Byte 12: Control Register 12
Byte 13: Control Register 13
Byte 14: Control Register 14
Byte 15: Control Register 15
Bit
Bit
Bit
Bit
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
@Pup
@Pup
@Pup
@Pup
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
CPU_DAF_M6
CPU_DAF_M5
CPU_DAF_M4
CPU_DAF_M3
CPU_DAF_M2
CPU_DAF_M1
CPU_DAF_M0
CPU_DAF_N8
Recovery_N8
Recovery N7
Recovery N6
Recovery N5
Recovery N4
Recovery N3
SMSW_SEL
SW_RESET
RESERVED
RESERVED
SRC_N7
SRC_N6
SRC_N5
SRC_N4
SRC_N3
SRC_N2
SRC_N1
SRC_N0
SRC_N8
FS_[E:A]
Name
Name
Name
Name
PCIF
If Prog_CPU_EN is set, the values programmed is 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 FSEL[3:0] register will be used.
SRC Dial-A-Frequency Bit N7
SRC Dial-A-Frequency Bit N6
SRC Dial-A-Frequency Bit N5
SRC Dial-A-Frequency Bit N4
SRC Dial-A-Frequency Bit N3
SRC Dial-A-Frequency Bit N2
SRC Dial-A-Frequency Bit N1
SRC Dial-A-Frequency Bit N0
SRC Dial-A-Frequency Bit N8
Software Reset.
When set the device will assert a reset signal on SRESET# upon
completion of the block/word/byte write that set it. After asserting and
deasserting the SRESET# this bit will self clear (set to 0).
The SRESET# pin must be enabled by latching SRESET#_EN on
VTT_PRWGD# to utilize this feature.
FS_Override
0 = Select operating frequency by FS(E:A) input pins
1 = Select operating frequency by FSEL_(4:0) settings
Smooth switch select
0: Select CPU_PLL
1: Select SRC_PLL.
RESERVED, Set = 0
RESERVED, Set = 0
Free running 33-MHz Output Drive Strength
0 = 2x, 1 = 1x
Watchdog Recovery Bit
Watchdog Recovery Bit
Watchdog Recovery Bit
Watchdog Recovery Bit
Watchdog Recovery Bit
Watchdog Recovery Bit
Description
Description
Description
Description
www.DataSheet4U.com
CY28439
Page 9 of 21