gc80c510 CORERIVER Semiconductor, gc80c510 Datasheet - Page 103

• Manufacturer Part Number: gc80c510
• Description: Eprom/rom 8-bit Turbo Microcontrollers
• Manufacturer: CORERIVER Semiconductor

6.2.11.2 Power-down Mode
MiDAS1.1 Family
this will be the last instruction to be executed before the device goes into Power-down mode. In the
Power-down mode, all the clocks are stopped and the device comes to a halt. All activity is completely
stopped and the power consumption is reduced to the lowest possible value. In this state, ALE and
/PSEN pins are pulled low. The port pins output the values held by their respective SFRs.
external interrupt pin, INT0B, and INT1B, enabled as level detect (0 or 1). An external RESETB can be
used to exit the Power-down state. The high on RESETB pin terminates the Power-down mode, and
restarts the clock. The program execution will restart from 0000H. In the Power-down mode, the clock is
stopped, so the Watchdog timer cannot be used to provide the reset to exit Power-down mode.
The Power-down mode has two stop mode by WDT ON/OFF. And the stop mode is that both CPU and
peripherals are not running.
forcing an external interrupt pin activated, provided the corresponding interrupt is enabled, while the
global enable (EA) bit is set and the external input has been set to a level detect mode. If these
conditions are met, then the low level on the external pin restarts the oscillator. User should hold
external interrupt pin to “0” for at least 65,536clocks. Because of crystal stabilization time, 65,536 clocks
must be needed to wake-up from Power-down mode. After 65,536 clocks, system clock will be running
normally and interrupt logic will catch the external interrupt. Then device executes the interrupt service
routine for the corresponding external interrupt. After the interrupt service routine is completed, the
program execution returns to the instruction after the one which put the device into Power-down mode
and continues from there.
wake-up from WDT interrupt or RESETB.
The device can be put into Power-down mode by writing 1 to bit PCON.1. The instruction that does
The MiDAS1.1 family will exit the Power-down mode with a WDT interrupt, RESETB, or by the two
In the stop mode 1(WDT is OFF), the MiDAS1.1 family can be woken from the Power-down mode by
In stop mode 2 (WDT is ON), The MiDAS1.1 family can be woken from the Power-down mode by
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