CHAPTER 19 STANDBY FUNCTION
User’s Manual U16896EJ2V0UD
581
(2) Releasing IDLE mode by reset
The same operation as the normal reset operation is performed.
Table 19-5. Operation Status in IDLE Mode
When CPU Is Operating with Main Clock
Setting of IDLE Mode
Item
When Subclock Is Not Used
When Subclock Is Used
CPU Stops
operation
ROM correction
Stops operation
Main clock oscillator
Oscillation enabled
Subclock oscillator
−
Oscillation enabled
Internal oscillator (f
R
) Operable
Interrupt controller
Stops operation
16-bit timer (TMP0)
Stops operation
16-bit timer (TM01)
Operable when INTWT is selected as count
clock and f
BRG
is selected as count clock of
WT
Operable when INTWT is selected as
count clock
8-bit timers (TM50, TM51)
•
Operable when TI5m is selected as count clock
•
Operable when INTTM010 is selected as count clock and TM01 is enabled in IDLE mode
Timer H (TMH0)
Stops operation
Timer H (TMH1)
Operable when f
R
/2048 is selected as count clock
Watch timer
Operable when main clock is selected as
count clock
Operable
Watchdog timer 1
Stops operation
Watchdog timer 2
Operable when f
R
/8 is selected as count
clock
Operable
CSI00, CSI01
Operable when SCK0m input clock is selected as operation clock
I
2
C0
Note 1
Stops
operation
UART0
Operable when ASCK0 is selected as count clock
Serial interface
UART1 Stops
operation
Key interrupt function
Operable
A/D converter
Stops operation
Note 2
Real-time output
Operable when INTTM5m is selected as real-time output trigger and TM5m is enabled in
IDLE mode.
However, the RTBH0 and RTBL0 registers cannot be updated because the CPU is
stopped.
Clock monitor (CLM)
Operable
Power-on-clear (POC)
Operable
Low-voltage detection (LVI)
Operable
Port function
Retains status before IDLE mode was set.
Internal data
The CPU registers, statuses, data, and all other internal data such as the contents of the
internal RAM are retained as they were before the IDLE mode was set.
Notes 1.
Only in the
μ
PD703302Y, 70F3302Y
2.
Set the ADM.ADCS and ADM.ADCS2 bits to 00B.
Remark
m = 0, 1
<R>
<R>