Epson S5U1C63007P Manual page 11

CHAPTER 3: PRECAUTIONS ON USING THE S5U1C63007P PERIPHERAL CIRCUIT BOARD
<Access to undefined address space>
If undefined address space in the ROM or RAM is accessed for read or write, the read or written
values become indeterminate. Furthermore, since the way these values become indeterminate is
different in the S5U1C63007P board and an in actual IC, care should be exercised. Note that the ICE
has a function to cause program execution to break when access to an undefined address space is
attempted.
<Reset circuit>
- The S5U1C63007P board does not contain an oscillation stop detection circuit (to generate a system
reset signal when the oscillation has stopped). Note that the oscillation stop detection circuit does not
guarantee operation with 100% accuracy.
- The sequence of operations from when the ICE is powered on until the program starts operating is
different in the S5U1C63007P board and an actual IC. The ICE enters a ready state when the user
program, etc., as well as option data are loaded on the S5U1C63007P board.
<Internal power supply circuit>
- For VDC, DBON, HLON, VDSEL, and VCSEL, the S5U1C63007P board only contains registers and
does not actually control the voltages. Moreover, in the actual IC S1C63557/558 that is supported
S5U1C63007P, the resisters mentioned above cannot be used.
- Although the S5U1C63007P board has a control (VLCD) to adjust the LCD drive voltage, an actual IC
in almost all cases does not have such an adjustment facility; therefore, be careful. Note that this
control is useful for only those models whose LCD drive bias is 1/2 or 1/3.
- The operating frequency range that can be used depends on the internal power-supply voltage.
Therefore, consult the technical hardware manual to ensure that your system will not be operated
with an improper combination of operating frequency and internal power-supply voltage.
<FSK demodulator>
The S5U1C63007P provides the FSK demodulator shown in Figure 3.2.1 using the NPC SM8220P
CMOS IC. The TIP and RING pins are provided with an exclusive connector.
J2 TMCRFI-64
C69 C70
0.22µF 0.22µF
D17
1SS81
D19
1SS81
V
SS
S5U1C63007P MANUAL (PERIPHERAL CIRCUIT
BOARD FOR S1C63557/63558/63567)
V
DD
F1
1
B
2
CB
BNX002-01
V
SS
C66 R145
510pF 10kΩ
C68 R146
510pF 10kΩ
D18
1SS81
V
DD
D20
R147 R148
1SS81
470kΩ 270kΩ
R149
C71
0.22µF
33kΩ
V V
SS SS
Fig. 3.2.1 FSK demodulator
3
PSG
C64
10µF
4
CG
C66
0.1µF
U23
1
TIP
2
RING FOUT
3
AGND
4
RDIN DOUT
5
RDRC
6
RDET CDET
7
POWN OSCOUT
8
GND OSCIN
SM8220P
EPSON
C67
16
V
DD
0.1µF CP4
15
14
LC-3-G
DMIN
13
12
NC
11
10
9
CP5
U50
LC-3-G
12
11
13
CP6
74HC00
LC-3-G
FSKIN
XCDIN
FOSC3
FSKON
XRDIN
5