MB91265 Series
Clock Control Block
Input the “L” signal to the INIT pin to assure the clock oscillation stabilization wait time.
Switch Shared Port Function
To switch between the use as a port and the use as a dedicated pin, use the port function register (PFR) .
Low Power Consumption Mode
To enter the standby mode, use the synchronous standby mode (set with the SYNCS bit as bit 8 in the TBCR :
timebase counter control register) and be sure to use the following sequence
(LDI
#value_of_standby, R0) : value_of_standby is write data to STCR.
(LDI
#_STCR, R12)
: _STCR is address (481H) of STCR.
STB
R0, @R12
: Writing to standby control register (STCR)
LDUB @R12, R0
: STCR read for synchronous standby
LDUB @R12, R0
: Dummy re-read of STCR
NOP
: NOP × 5 for arrangement of timing
NOP
NOP
NOP
NOP
In addition, please set I flag, ILM, and ICR to diverge to the interruption handler that is the return factor after the
standby returns.
• Please do not do the following when the monitor debugger is used.
• Break point setting for above instruction lines
• Step execution for above instruction lines
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