CHAPTER 19 STANDBY FUNCTION
User’s Manual U16896EJ2V0UD
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Table 19-3. Operation Status in HALT Mode
When CPU Is Operating with Main Clock
Setting of HALT 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
Operable
16-bit timer (TMP0)
Operable
16-bit timer (TM01)
Operable
8-bit timers (TM50, TM51)
Operable
Timer H (TMH0, TMH1)
Operable
Watch timer
Operable when main clock is selected as
count clock
Operable
Watchdog timer 1
Operable
Watchdog timer 2
Operable when f
R
/8 is selected as count
clock
Operable
CSI00, CSI01
Operable
I
2
C0
Note
Operable
Serial interface
UART0, UART1
Operable
Key interrupt function
Operable
A/D converter
Operable
Real-time output
Operable
Clock monitor (CLM)
Operable
Power-on-clear (POC)
Operable
Low-voltage detection (LVI)
Operable
Port function
Retains status before HALT 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 HALT mode was set.
Note
Only in the
μ
PD703302Y, 70F3302Y