User’s Manual U16431EJ1V0UM
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CHAPTER 4 DIFFERENCES BETWEEN TARGET DEVICE AND TARGET INTERFACE CIRCUIT
This chapter describes differences between the target device’s signal lines and the signal lines of the target
interface circuit of the IE system.
The target interface circuit of the IE system realizes emulation via an emulation circuit configured by an emulation
CPU, TTL, CMOS-IC, and other components. The electrical characteristics are different from those of the target
device because a protector and other circuits are provided.
(1) Signals input to or output from the emulation CPU (
µµµµ
PD789009A)
(2) Signals input to or output from the pin emulator (
µµµµ
PD7880)
(3) Signals input to or output from the pin emulator (
µµµµ
PD7883)
(4) Other
signals
The circuits of the IE-789882-NS-EM1 are used as follows for signals listed in (1) to (4) above. The same applies
to handling alternate-function pins, for which no circuit is provided in the IE system.
(1) Signals input to or output from the emulation CPU (
µµµµ
PD789009A)
•
Signals related to port 0
•
Signals related to port 1
•
RESET
(2) Signals input to or output from the pin emulator (
µµµµ
PD7880)
•
Signals related to port 3
•
Signals related to port 5
(3) Signals input to or output from the pin emulator (
µµµµ
PD7883)
•
Signals related to port 2
•
Signals related to port 8
•
Signals related to port 9
•
Signals related to port LCD
•
COM, S
(4) Other signals
•
V
DD
(target voltage input from the probe)
•
V
SS
