CY28349B Cypress Semiconductor, CY28349B Datasheet - Page 10
![no-image](/images/no-image-200.jpg)
CY28349B
Manufacturer Part Number
CY28349B
Description
FTG
Manufacturer
Cypress Semiconductor
Datasheet
1.CY28349B.pdf
(22 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Data Byte 10
Data Byte 11
Data Byte 12
Document #: 38-07454 Rev. *A
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit 7
Bit
Bit
Bit
Pin#
Pin#
Pin#
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
CPU_Skew2
CPU_Skew1
CPU_Skew0
Fixed 3V66/PCI
PCI_Skew1
PCI_Skew0
3V66_Skew1
3V66_Skew0
ROCV_FREQ_N7
ROCV_FREQ_N6
ROCV_FREQ_N5
ROCV_FREQ_N4
ROCV_FREQ_N3
ROCV_FREQ_N2
ROCV_FREQ_N1
ROCV_FREQ_N0
ROCV_FREQ_SEL
Name
Name
Name
CPU skew control
000 = Normal
001 = –150 ps
010 = –300 ps
011 = –450 ps
100 = +150 ps
101 = +300 ps
110 = +450 ps
111 = +600 ps
Fixed 3V66 and PCI output mode
0 = Disabled
1 = Enabled
When enabled, 3V66 and PCI output frequency will be
fixed at 64 MHz and 32 MHz respectively.
PCI skew control
00 = Normal
01 = –500 ps
10 = Reserved
11 = +500 ps
3V66 skew control
00 = Normal
01 = –150 ps
10 = +150 ps
11 = +300 ps
If ROCV_FREQ_SEL is set, the values programmed in
ROCV_FREQ_N[7:0] and ROCV_FREQ_M[6:0] will be
used to determine the recovery CPU output frequency
when a Watchdog Timer time-out occurs.
The setting of FS_Override bit determines the frequency
ratio for CPU and other output clocks. When FS_Override
bit is cleared, the same frequency ratio stated in the
Latched FS[4:0] register will be used. When it is set, the
frequency ratio stated in the SEL[4:0] register will be used.
ROCV_FREQ_SEL determines the source of the recover
frequency when a Watchdog Timer time-out occurs. The
clock generator will automatically switch to the recovery
CPU frequency based on the selection on
ROCV_FREQ_SEL.
0 = From latched FS[4:0]
1 = From the settings of ROCV_FREQ_N[7:0] &
ROCV_FREQ_M[6:0]
Pin Description
Pin Description
Pin Description
CY28349B
Page 10 of 22
Power On
Power On
Power On
Default
Default
Default
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0