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■ Access to the Low-power Consumption Mode Control Register
Writing in the low-power consumption mode control register executes a change in the low-power
consumption mode (including the stop mode, sleep mode, and time-base timer mode). Only the instructions
listed in Table 8.3-2 should be used for this purpose.
The low-power consumption mode transition instruction in Table 8.3-2 must always be followed by an
array of instructions highlighted by a line below.
MOV
NOP
NOP
JMP
MOV
The device does not guarantee its operation after returning from the low-power consumption mode if you
place an array of instructions other than the one enclosed in the line. To access the low-power consumption
mode control register (LPMCR) with C language, refer to "Notes on Accessing the Low-Power
Consumption Mode Control Register (LPMCR) to Enter the Standby Mode" in the Section "8.8 Usage
Notes on Low-Power Consumption Mode". If other instructions are used for switching to a low-power
consumption mode, operation cannot be assured. To control functions not listed in Table 8.3-1, any
instruction can be used.
When word-length is used for writing the low-power consumption mode control register, even addresses
must be used. Using odd addresses to switch to a low-power consumption mode may result in a
malfunction.
LPMCR, #H'XX
; the low-power mode transition instruction in Table 8.3-2
$+3
; jump to next instruction
A, #H'10
; any instruction
CHAPTER 8 LOW-POWER CONTROL CIRCUIT
145
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