Datasheet

CHAPTER 19 STANDBY FUNCTION
User’s Manual U18698EJ1V0UD
465
Table 19-3. Operating Statuses in STOP Mode
When STOP Instruction Is Executed While CPU Is Operating on Main System Clock STOP Mode Setting
Item
When CPU Is Operating on
Internal High-Speed
Oscillation Clock (f
RH)
When CPU Is Operating on
X1 Clock (f
X)
When CPU Is Operating on
External Main System Clock
(f
EXCLK)
System clock Clock supply to the CPU is stopped
fRH
fX
Stopped
Main system clock
fEXCLK Input invalid
Subsystem clock fXT Status before STOP mode was set is retained
fRL Status before STOP mode was set is retained
CPU
Flash memory
Operation stopped
RAM
Port (latch)
Status before STOP mode was set is retained
16-bit timer/
event counter 00
Note 1
Operable only when TM52 output or TI000 is selected as the count clock
50
51
Status before STOP mode was set is retained
8-bit timer/event
counter
52
Note 1
Operable only when TI52 is selected as the count clock
H0 Operable only when TM50 output is selected as the count clock during 8-bit timer/event
counter 50 operation
H1 Operable only when fRL, fRL/2
7
, fRL/2
9
is selected as the count clock
8-bit timer
H2 Operation stopped
Real-time counter Operable only when subsystem clock is selected as the count clock
Watchdog timer Operable. Clock supply to watchdog timer stops when “internal low-speed oscillator can be
stopped by software” is set by option byte.
Buzzer output
10-bit successive approximation
type A/D converter
Note 2
Operation stopped
UART0 Serial interface
UART6
Operable only when TM50 output is selected as the serial clock during 8-bit timer/event
counter 50 operation
LCD controller/driver Operable only when subsystem clock is selected as the count clock
Manchester code generator Operation stopped
Power-on-clear function
Low-voltage detection function
External interrupt
Operable
Notes 1. Do not start operation of these functions on the external clock input from peripheral hardware pins in the
stop mode.
2. μ PD78F041x only.
Remark f
RH: Internal high-speed oscillation clock
f
X: X1 clock
f
EXCLK: External main system clock
f
XT: XT1 clock
f
RL: Internal low-speed oscillation clock