UPD78F1502AGK-GAK-AX Datasheet, PDF (799/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 21 STANDBY FUNCTION
Table 21-2. Operating Statuses in STOP Mode
STOP Mode Setting
When STOP Instruction Is Executed While CPU Is Operating on Main System Clock
When CPU Is Operating on When CPU Is Operating on When CPU Is Operating on
Internal High-Speed
X1 Clock (fX)
External Main System Clock
Item
Oscillation Clock (fIH)
(fEX)
System clock
Clock supply to the CPU is stopped
Main system clock fIH
Stopped
fX
fEX
Subsystem clock fXT
Status before STOP mode was set is retained
fIL
Set by bits 0 (WDSTBYON) and 4 (WTON) of option byte (000C0H)
• WTON = 0: Stops
• WTON = 1 and WDSTBYON = 1: Oscillates
• WTON = 1 and WDSTBYON = 0: Stops
CPU
Operation stopped
Flash memory
RAM
Status before STOP mode was set is retained at voltage higher than POC detection voltage.
Port (latch)
Status before STOP mode was set is retained
Timer array unit (TAU)
Cannot operate
Real-time counter (RTC)
Operable
Watchdog timer
Set by bits 0 (WDSTBYON) and 4 (WTON) of option byte (000C0H)
• WTON = 0: Stops
• WTON = 1 and WDSTBYON = 1: Operates
• WTON = 1 and WDSTBYON = 0: Stops
Clock output/buzzer output
Operable only when subsystem clock is selected as the count clock
A/D converter
Operation stopped
D/A converter
Operational amplifier
Operable
Voltage reference
Serial array unit (SAU)
Cannot operate
Serial interface (IICA)
Wake-up by address match operable
LCD controller/driver
Operable only when subsystem clock is selected as LCD source clock
Multiplier/divider
Cannot operate
DMA controller
Power-on-clear function
Operable
Low-voltage detection function
External interrupt
Key interrupt
Remarks 1.
2.
fIH: Internal high-speed oscillation clock,
fX: X1 oscillation clock
fEX: External main system clock,
fXT: XT1 oscillation clock
fIL: Internal low-speed oscillation clock
The functions mounted depend on the product. Refer to 1.4 Block Diagram and 1.5
Functions.
Outline of
R01UH0004EJ0501 Rev.5.01
783
Jun 20, 2011