MX10L8050X
IDLE MODE
The user's software can invoke the Idle Mode. When
the microcontroller is in this mode, power consumption
is reduced. The Special Function Registers and the
onboard RAM retain their values during Idle, but the pro-
cessor stops executing instructions. Idle Mode will be
exited if the chip is reset or if an enabled interrupt oc-
curs.
ABSOLUTE MAXIMUM RATING*
Ambient Temperature Under Bias
Storage Temperature
Voltage on Any Other Pin to VSS
IOL Per I/O Pin
Power Dissipation
-40° to +85°
C
C
-65° to +150°
C
C
-0.5V to +6.5V
15mA
1.5W
(Based on PACKAGE heat transfer limitations, not de-
vice consumption)
Table 2. Status of the External Pins during Idle and Power Down
Mode
Idle
Idle
Power Down
Power Down
Program Memory
Internal
External
Internal
External
ALE
1
1
0
0
PSEN
1
1
0
0
PORT0
Data
Float
Data
Float
PORT1
Data
Data
Data
Data
PORT2
Data
Address
Data
Data
PORT3
Data
Data
Data
Data
POWER DOWN MODE
To save even more power, a Power Down mode can be
invoked by software. If this mode, the oscillator is stopped
and the instruction that invoked Power Down is the last
instruction executed. The on-chip RAM and Special
Function Registers retain their values until the Power
Down mode is terminated.
On the MX10L8050X either a hardware reset or an exter-
nal interrupt can cause an exit from Power Down. Re-
set redefines all the SFRs but does not change the on-
chip RAM. An external interrupt allows both the SFRs
and on-chip RAM to retain their values.
To properly terminate Power Down, the reset or external
interrupt should not be executed before VCC is restored
to its normal operating level, and must be held active
long enough for the oscillator to restart and stabilize (nor-
mally less than 10 ms).
With an external interrupt, INT0 and INT1 must be en-
abled and configured as level-sensitive. Holding the pin
low restarts the oscillator but bringing the pin back high
completes the exit. Once the interrupt is serviced, the
next instruction to be executed after RETI will be the
one following the instruction that put the device into Power
Down.
OPERATING CONDITIONS
Symbol
TA
Description
Ambient Temperature Under Bias
Commerical
Industrial
Oscillator Frequency
Min
0
-40
2.7
3.5
Max
+70
+85
5.5
40
Units
°
C
°
C
V
MHz
VCC
fOSC
P/N:PM0803
REV. 0.0, APR. 23, 2001
5
MCNIX [ MACRONIX INTERNATIONAL ]
