HT66F016 View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT66F016' PDF : 116 Pages View PDF
HT66F016/HT66F017/HT68F016/HT68F017
HT66F016R/HT66F017R/HT68F016R/HT68F017R
S LO W M ode
C K S 2~C K S 0¹000B ,001B as H LC LK =0
orH LC LK =1
N O R M A L M ode
W D T a n d L V D a r e a ll o ff
ID L E N = 0
H A L T in s tr u c tio n is e x e c u te d
S LE E P 0 M ode
W D T o r L V D is o n
ID L E N = 0
H A L T in s tr u c tio n is e x e c u te d
S LE E P 1 M ode
ID L E N = 1 , F S Y S O N = 0
H A L T in s tr u c tio n is e x e c u te d
ID L E 0 M o d e
ID L E N = 1 , F S Y S O N = 1
H A L T in s tr u c tio n is e x e c u te d
ID L E 1 M o d e
SLOW Mode to NORMAL Mode Switching
In SLOW Mode the system uses the LIRC low speed
system oscillator. To switch back to the NORMAL Mode,
where the high speed system oscillator is used, the
HLCLK bit should be set to ²1² or HLCLK bit is ²0², but
CKS2~CKS0 is set to ²010², ²011², ²100², ²101², ²110²
or ²111². As a certain amount of time will be required for
the high frequency clock to stabilise, the status of the
HTO bit is checked. The amount of time required for
high speed system oscillator stabilization depends upon
which high speed system oscillator type is used.
Entering the SLEEP0 Mode
There is only one way for the device to enter the
SLEEP0 Mode and that is to execute the ²HALT² instruc-
tion in the application program with the IDLEN bit in
SMOD register equal to ²0² and the WDT and LVD both
off. When this instruction is executed under the condi-
tions described above, the following will occur:
· The system clock, WDT clock and Time Base clock
will be stopped and the application program will stop
at the ²HALT² instruction.
· The Data Memory contents and registers will maintain
their present condition.
· The WDT will be cleared and stopped no matter if the
WDT clock source originates from the fSUB clock or
from the system clock.
· The I/O ports will maintain their present conditions.
· In the status register, the Power Down flag, PDF, will
be set and the Watchdog time-out flag, TO, will be
cleared.
Rev. 1.40
37
November 22, 2016
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