Renesas H8/3644 Series User 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.
Vpp/P90 pin (P90 is an I/O port)
From user system
TEST pin
From user system
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.
18
Zener voltage: Approx. 6.0 V
Ω
470 x 2
10 k Ω
15 k Ω
27 k Ω
Figure 13 P1 Short Connector
To E6000 emulator station
To E6000 emulator station