User’s Manual U16290EJ1V0UM
40
CHAPTER 5 RESTRICTIONS
This chapter describes the differences between the target device and IE system specifications. The emulation
circuit of the IE system is configured of an EVA chip, TTL, CMOS-IC, etc., to realize emulation. Therefore, there are
differences between the target device and IE system specifications.
••••
Emulating an RC oscillator not possible by SEL pin input in the IE-789835-NS-EM1
The SEL pin, which is left open, does not accept input. The IE system is fixed to ceramic/crystal oscillation.
Emulating the oscillator is limited to the functions described in
3.4 Clock Settings
.
••••
The power supply voltage of the subsystem clock cannot be changed in the IE-789835-NS-EM1
The V
ROUT0
pin is fixed to V
DD
(L
VCC
: 1.8 V to 3.6 V). Even if PSC00 (FFAFH) is changed to “1”, switching to the
V
ROUT0
voltage will not be enabled. The V
ROUT0
pin is connected to GND via a capacitor of 0.47
µ
F in the IE-
789835-NS-EM1.
••••
The voltage level of the LCD reference voltage (V
LC0
to V
LC4
) does not satisfy the specified value in the
IE-789835-NS-EM1
The V
LC0
voltage is the specified value (when the voltage level of the boost circuit is set by VLCD00 (FFB3H)) –
0.53 V
±
10%.
The V
LC0
voltage can be controlled within the range of the specified value – 0.35 V
±
15% by using the external
boost circuit of the IE-789835-NS-EM1. For the external boost circuit, refer to
3.6 LCD Emulation
.