
150
EPSON
S1C8F360 TECHNICAL MANUAL
7 DIFFERENCES FROM S1C883XX/S1C888XX
7.4 Initial Reset
___________
When turning the S1C8F360 power on, the RESET
terminal must be maintained at a Low (VSS) level
until the supply voltage goes to 2.4 V or more.
VDD
RESET
tpsr
2.4 V
0.5VDD
0.1VDD
Power ON
Fig. 7.4.1 Initial reset at power-on
The S1C8F360 uses initial reset as a trigger for
setting either the normal operation mode or the
programming mode. Therefore, design the reset
circuit so that the IC will be reset for sure.
When resetting the IC in the normal operation
_________
mode, make sure to fix the SPRG terminal at a High
level.
7.5 ROM
The S1C8F360 has employed a Flash EEPROM for
the internal ROM. The ROM has a capacity of
61,440 steps
× 8 bits and is allocated to 000000H–
00EFFFH. The Flash EEPROM can be rewritten up
to1,000 times. Rewriting data is done at the user’s
own risk.
7.6 RAM
The built-in RAM has a capacity of 2,048 words
× 8
bits and is allocated to 00F000H–00F7FFH.
7.7 Oscillation Circuit
In the S1C8F360, a crystal oscillator can only be
used for the OSC1 oscillation circuit and a crystal or
ceramic oscillator for the OSC3 oscillation circuit.
Furthermore, pay attention to the difference on the
oscillation start time according to the supply
voltage. Be sure there is enough margin especially
for stabilizing the OSC3 oscillation when control-
ling the peripheral circuit that uses the OSC3 clock.
7.8 LCD Controller
In the S1C8F360, the LCD power supply type
(TYPE A or TYPE B) and LCD drive duty (1/8 or 1/
16 & 1/32), that are selected by mask option in the
S1C88xxx, can be selected by software. Address
00FF09H is added to the I/O map for this selection.
7.9 A/D Converter
The S1C8F360 has a built-in A/D converter that is
not supported by the S1C88xxx. However, the A/D
converter cannot be used with the analog compara-
tor simultaneously.
7.10 SVD Circuit
The S1C8F360 has a built-in SVD (Supply Voltage
Detection) circuit. The mask option for reseting
when low voltage is detected (available in the
S1C88xxx) is not provided in the S1C8F360. There-
fore, the function cannot be used with the
S1C8F360.
Table 7.8.1 Additional LCD control registers
Table 7.10.1 Supply voltage detection level
Detection level
Level 1
→ Level 0
Level 2
→ Level 1
Level 3
→ Level 2
Level 4
→ Level 3
Level 5
→ Level 4
Level 6
→ Level 5
Level 7
→ Level 6
Level 8
→ Level 7
Level 9
→ Level 8
Level 10
→ Level 9
Level 11
→ Level 10
Level 12
→ Level 11
Level 13
→ Level 12
Level 14
→ Level 13
Level 15
→ Level 14
Min.
Typ.
× 0.92
Typ.
× 0.88
S1C883xx/888xx
Typ.
1.82
2.00
2.18
2.36
2.54
2.72
2.90
3.08
3.26
3.45
3.65
3.85
4.05
4.25
4.50
Max.
Typ.
× 1.08
Typ.
× 1.12
Min.
Typ.
× 0.92
S1C8F360
Typ.
1.83
2.00
2.17
2.33
2.50
2.67
2.83
3.00
3.17
3.33
3.50
3.67
3.83
4.00
4.17
Max.
Typ.
×1.08
Address Bit
Name
SR R/W
Function
Comment
10
00FF09 D7
D6
D5
D4
D3
D2
D1
D0
–
LCDB
LCDAJ
DUTY8
–
Reserved
Power TYPE A (4.5V)/B (5.5V) switch
LCD drive duty switch
Constantry "0" when
being read
–
0
R/W
–
1
TYPE A
1/8 duty
–
0
TYPE B
1/16, 1/32
*1
*1 Writing "1" to DUTY8 (FF09D0) disables 1/16 and 1/32 duty selection using LDUTY (FF10D1).