參數(shù)資料
型號(hào)： MB90F387SPMT
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP48
封裝： PLASTIC, LQFP-48
文件頁數(shù)： 11/64頁
文件大?。?/td> 1777K
代理商： MB90F387SPMT
MB91260B Series
DS07-16507-3E
19
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
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
Notes on the PS register
As the PS register is processed by some instructions in advance, exception handling below may cause the
interrupt handling routine to break when the debugger is used or the display contents of flags in the PS register
to be updated.
As the microcontroller is designed to carry out reprocessing correctly upon returning from such an EIT event, it
performs operations before and after the EIT as specified in either case.
The following operations may be performed when the instruction immediately followed by a DIV0U/DIV0S
instruction is (a) acceptance of a user interrupt, (b) single-stepped, or (c) breaks in response to a data event
or emulator menu :
1) The D0 and D1 flags are updated in advance.
2) An EIT handling routine (user interrupt or emulator) is executed.
3) Upon returning from the EIT, the DIV0U/DIV0S instruction is executed, and the D0 and D1 flags are updated
to the same values as in 1).
The following operations are performed when the ORCCR/STILM/MOVRi and PS instructions are executed
to allow the interrupt.
(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
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