MC68HC705J MOTOROLA [Motorola, Inc], MC68HC705J Datasheet - Page 84

• Manufacturer Part Number: MC68HC705J
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Low-Power Modes
5.4.5 EPROM/OTPROM
5.4.6 Data-Retention Mode
Technical Data
84
The STOP instruction:
The WAIT instruction:
In data-retention mode, the MCU retains random-access memory (RAM)
contents and CPU register contents at V
The data-retention feature allows the MCU to remain in a low
power-consumption state during which it retains data, but the CPU
cannot execute instructions.
To put the MCU in data-retention mode:
To take the MCU out of data-retention mode:
1. Drive the RESET pin to logic 0.
2. Lower the V
1. Return V
2. Return the RESET pin to logic 1.
The STOP instruction during erasable, programmable read-only
memory (EPROM) programming clears the EPGM bit in the EPROM
programming register, removing the programming voltage from the
EPROM.
The WAIT instruction has no effect on EPROM/one-time
programmable read-only memory (OTPROM) operation.
continuously during data-retention mode.
DD
Low-Power Modes
DD
to normal operating voltage.
voltage. The RESET pin must remain low
DD
voltages as low as 2.0 Vdc.
MC68HC705J1A — Rev. 4.0
MOTOROLA