M30280F6HP RENESAS [Renesas Technology Corp], M30280F6HP Datasheet - Page 374

• Manufacturer Part Number: M30280F6HP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES
• Manufacturer: RENESAS [Renesas Technology Corp]

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5. Wait until the main clock oscillation stabilization time, before switching the CPU clock source to the
6. Suggestions to reduce power consumption
0 .
B
(a) Ports
(b) A/D converter
(c) Stopping peripheral functions
(d) Switching the oscillation-driving capacity
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main clock.
clock.
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Similarly, wait until the sub clock oscillates stably before switching the CPU clock source to the sub
0
The processor retains the state of each I/O port even when it goes to wait mode or to stop mode. A
current flows in active I/O ports. A dash current may flow through the input ports in high impedance
state, if the input is floating. When entering wait mode or stop mode, set non-used ports to input and
stabilize the potential.
When A/D conversion is not performed, set the VCUT bit in ADCON1 register to “0” (no Vref connec-
tion). When A/D conversion is performed, start the A/D conversion at least 1 s or longer after setting
the VCUT bit to “1” (Vref connection).
Use the CM0 register CM02 bit to stop the unnecessary peripheral functions during wait mode.
However, because the peripheral function clock (f
this measure is not conducive to reducing the power consumption of the chip. If low speed mode or
low power dissipation mode is to be changed to wait mode, set the CM02 bit to “0” (do not peripheral
function clock stopped when in wait mode), before changing wait mode.
Set the driving capacity to “LOW” when oscillation is stable.
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) generated from the sub-clock does not stop,
20. Precautions