Renesas H8/3644 Series - Manual (Page 24)

6. The flash memory functions of the H8/3644 series are not supported by the emulator. Therefore,
do not apply 12 V to Vpp/P90 and TEST pins. If 12 V is applied, the emulator will detect it as
the test mode. The Vpp/P90 and TEST pins have circuits for protection against 12-v application,
as shown in figure 12.
To E6000 emulator station
To E6000 emulator station
10 k
Ω
27 k
Ω
15 k
Ω
470
Zener voltage: Approx. 6.0 V
x 2
Ω
Vpp/P90 pin (P90 is an I/O port)
From user system
From user system
TEST pin
Figure 12 Vpp/P90 and TEST Pin Protection Circuits
7. The P1 short connector is used for testing. Do not remove the inserted jumper pin.
Figure 13 P1 Short Connector
18