.........................Document #: 38-07703 Rev. ** Page 9 of 18
Byte 11: Recovery Frequency N - Value Register
Bit Name Default Description
Bit 7 ROCV_FREQ_N7 0 If ROCV_FREQ_SEL is set, W311 will use the values programmed in ROCV_-
FREQ_N[7:0] and ROCV_FREQ_M[6:0] 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, SDRAM,
AGP and SDRAM. When it is cleared, W311 will use the same frequency ratio
stated in the Latched FS[4:0] register. When it is set, W311 will use the
frequency ratio stated in the SEL[4:0] register.
W312 supports programmable CPU frequency ranging from 50 MHz to 248
MHz.
W311 will change the output frequency whenever there is an update to either
ROCV_FREQ_N[7:0] and ROCV_FREQ_M[6:0]. Therefore, it is recommended
to use Word or Block write to update both registers within the same SMBus bus
operation.
Bit 6 ROCV_FREQ_N6 0
Bit 5 ROCV_FREQ_N5 0
Bit 4 ROCV_FREQ_N4 0
Bit 3 ROCV_FREQ_N3 0
Bit 2 ROCV_FREQ_N2 0
Bit 1 ROCV_FREQ_N1 0
Bit 0 ROCV_FREQ_N0 0
Byte 12: Recovery Frequency M- Value Register
Bit Name Default Pin Description
Bit 7 ROCV_FREQ_SEL 0 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_FRE-
Q_SEL.
0 = From latched FS[4:0]
1 = From the settings of ROCV_FREQ_N[7:0] & ROCV_FREQ_M[6:0]
Bit 6 ROCV_FREQ_M6 0 If ROCV_FREQ_SEL is set, W311 will use the values programmed in ROCV_-
FREQ_N[7:0] and ROCV_FREQ_M[6:0] 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, SDRAM, AGP and
SDRAM. When it is cleared, W311 will use the same frequency ratio stated in
the Latched FS[4:0] register. When it is set, W311 will use the frequency ratio
stated in the SEL[4:0] register. W311 supports programmable CPU frequency
ranging from 50 MHz to 248 MHz.
Bit 5 ROCV_FREQ_M5 0
Bit 4 ROCV_FREQ_M4 0
Bit 3 ROCV_FREQ_M3 0
Bit 2 ROCV_FREQ_M2 0
Bit 1 ROCV_FREQ_M1 0
Bit 0 ROCV_FREQ_M0 0
Byte 13: Programmable Frequency Select N-Value Register
Bit Name Default Pin Description
Bit 7 CPU_FSEL_N7 0 If Prog_Freq_EN is set, W311 will use the values programmed in CPU_F-
SEL_N[7:0] and CPU_FSEL_M[6:0] to determine the CPU output frequency.
The new frequency will start to load whenever CPU_FSELM[6:0] is updated.
The setting of FS_Override bit determines the frequency ratio for CPU,
SDRAM, AGP and SDRAM. When it is cleared, W311 will use the same
frequency ratio stated in the Latched FS[4:0] register. When it is set, W311
will use the frequency ratio stated in the SEL[4:0] register. W311 supports
programmable CPU frequency ranging from 50 MHz to 248 MHz.
Bit 6 CPU_FSEL_N6 0
Bit 5 CPU_FSEL_N5 0
Bit 4 CPU_FSEL_N4 0
Bit 3 CPU_FSEL_N3 0
Bit 2 CPU_FSEL_N2 0
Bit 1 CPU_FSEL_N1 0
Bit 0 CPU_FSEL_N0 0
