Renesas RL78/I1D Application Note page 6

RL78/I1D
4. Software explanation
4.1. Outline of operation
In this sample code, the operation state of RL78/I1D is switched by the button pressing (INTP0 interrupt generation).
There are 8 kinds of operation states with combination of the flash operation mode and the regulator mode. After 8-time
external interrupt INTO0 generations, it returns back to the state same as after reset. The operation state is displayed by
the combination of turning on, turning off, and blinking LED. The fixed periodical interrupt processing triggered by the
12-bit interval timer updates the LED display. The transition to HS (high speed main) mode is executed when the VDD
voltage is 2.4V or more. In the case of VDD below 2.4V, the transition to the HS mode is not executed. LED is blinked
to inform the error.
Table 4.1 shows operation state detail and operation state transition.
Transition State
state
0 LV mode
(after
reset)
1 LS mode
(Normal
setting)
2 LS mode
(low
consumption
setting)
3 LS mode
(Normal
setting)
4 HS mode
4-Error LS mode
(Normal
setting)
5 LS mode
(Normal
setting)
6 LP mode
7 LS mode
(Normal
setting)
R01AN3597EJ0100 Rev.1.00
Jan. 31, 2017
Table 4.1 Operation state detail and operation state transition
LED1 LED2
Turning off Turning on
Turning on Turning off
High-speed Turning off
blinking
Turning on Turning off
Turning on Turning on
Super-high-speed Super-high-speed
blinking blinking
Turning on Turning off
Low-speed Turning off
blinking
Turning on Turning off
Operation state switching IAR
Operation clock Range
operation
voltage
HOCO: 4MHz 1.6V~3.6V
HOCO: 8MHz 1.8V~3.6V
MOCO: 4MHz 1.8V~3.6V
HOCO: 8MHz 1.8V~3.6V
HOCO: 16MHz 2.4V~3.6V
HOCO: 8MHz 1.8V~3.6V
HOCO: 8MHz 1.8V~3.6V
MOCO: 1MHz 1.8V~3.6V
HOCO: 8MHz 1.8V~3.6V
of Status of the
next
transition
1
2
3
4 or
4-Error
5
5
6
7
0
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