M306H2MC-XXXFP Datasheet, PDF (185/210 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with DATA ACQUISITION CONTROLLER

MITSUBISHI MICROCOMPUTERS
M306H2MC-XXXFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
with DATA ACQUISITION CONTROLLER
(6) Notes on operating with a low supply voltage (VCC = 3.0 V)
When in single-chip mode, this product can operate with a low supply voltage (VCC = 3.0 V) only
during low power dissipation mode. Before operating with a low supply voltage, always be sure to set
the relevant register bits to select low power dissipation mode (BCLK : f(XCIN), main clock XIN : stop,
subclock XCIN : oscillating). Then reduce the power supply voltage VCC to 3.0 V.
Also, when returning to normal operation, raise the power supply voltage to 5V while in low power
consumption mode before entering normal operation mode.
When moving from any operation mode to another, make sure a state transition occurs according to
the state transition diagram (Figure 2.5.5) in Section 2.5.7, "Power control."
The status of the power supply voltage VCC during operation mode transition is shown in Figure 3.1
below.
5V
VCC
3V
Power control
operation modes
Normal operation mode Low power dissipation mode
Normal operation mode
Note 1: Normal operation mode refers to the high-speed, medium-speed, and low-speed modes.
Note 2: When operating with a low supply voltage, be aware that only the CPU, ROM, RAM,
input/output ports, timers (timers A and B), and the interrupt control circuit can be used.
All other internal resources (e.g., data slicer, DMAC, A/D, and D/A) cannot be used.
Figure 3.1 Status of the power supply voltage VCC during operation mode transition
Rev. 1.0
184