upd78f0124hgba1-8et-a Renesas Electronics Corporation., upd78f0124hgba1-8et-a Datasheet - Page 114

• Manufacturer Part Number: upd78f0124hgba1-8et-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

Operation
Mode
Reset
STOP
HALT
Notes 1.
Caution The RSTOP setting is valid only when “Can be stopped by software” is set for internal oscillator by
Remark MSTOP: Bit 7 of the main OSC control register (MOC)
114
Status
2.
3.
4.
the option byte.
MCC:
RSTOP: Bit 0 of the internal oscillation mode register (RCM)
MCM0:
Caution The RSTOP setting is valid only when “Can be stopped by software” is set for internal
MSTOP = 1
MSTOP = 0
MCC = 1
MCC = 0
Note Setting high-speed system clock oscillator oscillating/stopped differs depending on the CPU clock
Remark MSTOP: Bit 7 of the main OSC control register (MOC)
When “Cannot be stopped” is selected for internal oscillator by the option byte.
When “Can be stopped by software” is selected for internal oscillator by the option byte.
Operates using the CPU clock at STOP instruction execution.
Operates using the CPU clock at HALT instruction execution.
MSTOP = 0
Stopped
Oscillating
MCC = 0
used.
• When the internal oscillation clock is used as the CPU clock: Set using the MSTOP bit
• When the subsystem clock is used as the CPU clock: Set using the MCC bit
Table 5-3. Relationship Between Operation Clocks in Each Operation Status
High-Speed System
Note
Note
Clock Oscillator
Bit 7 of the processor clock control register (PCC)
Bit 0 of the main clock mode register (MCM)
oscillator by the option byte.
Note
Note
MCC:
RSTOP: Bit 0 of the internal oscillation mode register (RCM)
Table 5-4. Oscillation Control Flags and Clock Oscillation Status
RSTOP = 0
RSTOP = 1
RSTOP = 0
RSTOP = 1
RSTOP = 0
RSTOP = 1
RSTOP = 0
RSTOP = 1
MSTOP = 1
Stopped
MCC = 1
Bit 7 of the processor clock control register (PCC)
Stopped
Oscillating Oscillating Stopped
High-Speed System Clock Oscillator
Stopped
Setting prohibited
Oscillating
Stopped
Oscillating
Note 1
CHAPTER 5 CLOCK GENERATOR
User’s Manual U16962EJ3V0UD
Internal Oscillator
RSTOP = 0 RSTOP = 1
Note 2
Subsystem
Oscillating
Oscillator
Oscillating
Oscillating
Stopped
Oscillating
Stopped
Oscillating
Stopped
Clock
Internal Oscillator
CPU Clock
Internal
oscillation
clock
Note 3
Note 4
Release
After
Supplied to Peripherals
MCM0 = 0 MCM0 = 1
Stopped
Stopped
Internal
oscillation
clock
Prescaler Clock
High-
speed
system
clock