Oki Dr.63514, User Manual, Page: 59 / 101

Chapter 2. Functions
2-38
2.9 Reset Input Switching
The reset signal to the evaluation chip in the emulator normally comes from the emulator's main control
CPU. There is, however, a setting for adding user cable reset (RESETB) input.
30k
Ω
C
I/O
I/O
VDD
MAX901
MAX901 AD826
D
CLK
Q
Mask option
HC4066
VIH
VIL
+
-
+
-
+
-
Reset signal
from main CPU
Reset input to
evaluation chip
Reset switch
signal
RESET
(User cable)
Figure 2-17 Reset Input
A built-in voltage conversion circuit converts the user cable reset (RESETB) input to the internal “H”
level from VDD, the positive power supply voltage (0.9 to 5 V).
n
Note 1
n
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User cable reset (RESETB) input is only relevant during evaluation and real-time emulation. It
is always prohibited during single-step emulation.
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n
Note 2
n
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The RESETB pin is only enabled during periods when the RUN LED is lit. In particular, reset
signal input to the RESETB pin from the user application system is disabled while the
Dr.63514 in-circuit emulator is initializing and after real-time emulation has been forcibly
terminated.
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