MB88155 Fujitsu Media Devices, MB88155 Datasheet - Page 18

• Manufacturer Part Number: MB88155
• Description: Spread Spectrum Clock Generator
• Manufacturer: Fujitsu Media Devices

18
MB88155
(Continued)
If the ENS pin is used for modulation enable control during normal operation, the set clock signal is output from the
CKOUT pin at most the lock-up time “t
Note : The wait time for the clock signal output from the CKOUT pin to become stable is required after the IC is
released from power-down mode by the XPD pin or after another pin’s setting is changed. During the period
until the output clock signal becomes stable, neither of the output frequency, output clock duty cycle, mod-
ulation period, and cycle-cycle jitter characteristic cannot be guaranteed. It is therefore advisable to take
action, such as cancelling a device reset at the stage after the lock-up time has passed.
XIN
ENS
CKOUT
V
IH
t
LK
(Lock-up time)
LK
” after the level at the ENS pin is determined.
t
LK
V
IL
(Lock-up time)