CHAPTER 4 HOW TO USE MINICUBE2 WITH 78K0 MICROCONTROLLER
User’s Manual U18371EJ1V0UM
89
(11) Period in which user program is stopped while pseudo real-time RAM monitor function is being
processed
The sampling time can be set in the Extended Option dialog box.
The following shows the execution time, whereas the operating frequency = 5 MHz and PCC = 0.
<When interrupts are enabled (EI) (with an RRM generated while a user program main routine is running)>
A B A B A
B
… A
C A
B
RRM Function Sampling Range
Break Time per Cycle
Max. Interrupt Pending Time
2 bytes
110 + 110
×
2 = 330
µ
s 110
µ
s
4 bytes
110 + 110
×
4 = 440
µ
s 110
µ
s
16 bytes
110 + 110
×
16 = 1,870
µ
s 110
µ
s
A (approx. 110
µ
s)
: Pseudo real-time RAM monitor function processing in progress
(during a break: RRM data collection and RRM data transmission)
B (approx. 1 ms)
: User program is running.
C
: User program is running (sampling time
−
A
−
(A + B)
×
sampling range).
(12) Caution on mounting a clock on 78K0-OCD board
When a clock is mounted on the 78K0-OCD board, power supply may not become the GND level even if the
power to the target system is shut down.
(13) Emulation of POC function
The POC function of the target device cannot be emulated. Make sure that the power to the target system is
not shut down during debugging
The A period occurs for the number of the RRM point bytes + 1.
Redraw Interval (sampling time)
One cycle = Several tens ms to several hundreds ms
