R01UH0092EJ0110 Rev.1.10
Page 127 of 807
Jul 31, 2012
M16C/64C Group
9. Power Control
9.4.2.2
Low Current Consumption Read Mode
Low current consumption read mode can be used when the CM07 bit in the CM0 register is 1 (sub
clock used as CPU clock).Figure 9.5 shows Setting and Canceling Low Current Consumption Read
Mode.
Figure 9.5
Setting and Canceling Low Current Consumption Read Mode
Note:
1. Do not rewrite bits FMR22 and FMR23 simultaneously.
Low current consumption read mode
Set the CM07 bit to 1 (sub clock used as a CPU clock)
Setting
procedure
Processing in low current consumption read mode
Set the FMR23 bit to 0
(1)
Completed
Canceling
procedure
Set the FMR22 bit to 0
(1)
Set the FMR22 bit to 0
and then to 1 (slow read mode enabled)
(1)
Set the FMR23 bit to 0 and then to 1
(low current consumption read mode enabled)
(1)
Set the CM05 bit to 1 (main clock oscillator stop)
Содержание M16C Series
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