
S1C60R08 TECHNICAL HARDWARE
EPSON
II-9
CHAPTER 3: SUMMARY OF NOTES
CHAPTER
3SUMMARY OF NOTES
3.1 Target Type for S1C60N08 Series
The S1C60N08 has 3 types (S1C60N08, S1C60A08 and S1C60L08).
In these models, the S1C60R08 supports the following 2 types as the ROM emulator model.
S1C60N08
VDD = 3.0 V (Typ.), OSC1
S1C60A08
VDD = 3.0 V (Typ.), OSC1/OSC3
Refer the "S1C60N08 Technical Hardware".
3.2 Mask/Segment Option
The S1C60R08 can load ROM emulator data. But cannot load the mask option and segment option.
Therefore customer must make the function option data and segment option data by the S1C60R08
development tool at first. Then send the data to SEIKO EPSON and order the mask. SEIKO EPSON
makes the S1C60R08 with a customized option according to this request.
3.3 Serial EEPROM
The external Serial EEPROM is necessary for programming the ROM emulator data, and this component
is recommended.
Recommended component: AK6010A/12A (AKM)
M24C64/32 (SGS-THOMSON)
BR24C64 (ROHM)
24AA64 (Microchip)
Note: Use larger EEPROM than program memory size.
3.4 Precautions on Mounting
<Oscillation Circuit>
q Oscillation characteristics change depending on conditions (board pattern, components used, etc.).
In particular, when using a crystal oscillator, use the oscillator manufacturer's recommended values
for constants such as capacitance and resistance.
q Disturbances of the oscillation clock due to noise may cause a malfunction. Consider the following
points to prevent this:
(1) Components which are connected to the OSC1, OSC2, OSC3 and OSC4 terminals, such as oscilla-
tors, resistors and capacitors, should be connected in the shortest line.
(2) As shown in the right hand figure, make a VDD pattern as large as
possible at circumscription of the OSC1/OSC3 and OSC2/OSC4
terminals and the components connected to these terminals.
Furthermore, do not use this VDD pattern for any purpose other
than the oscillation system.
q In order to prevent unstable operation of the oscillation circuit due to
current leak between OSC1/OSC3 and VSS, please keep enough
distance between OSC1/OSC3 and VSS or other signals on the board
pattern.
OSC2
OSC1
VDD
Sample VDD pattern