Specifications

3 FUNCTION OPTION GENERATOR FOG6003
S5U1C60N03D MANUAL EPSON 11
(DEVELOPMENT SOFTWARE TOOL FOR S1C60N03)
*** OPTION NO.5 ***
--- INTERRUPT NOISE REJECTOR ---
K00-K03 1. USE
2. NOT USE
PLEASE SELECT NO.(1) ? 1
K00-K03 1. USE SELECTED
*** OPTION NO.4 ***
--- MULTIPLE KEY ENTRY RESET ---
COMBINATION 1. NOT USE
2. USE K00,K01
3. USE K00,K01,K02
4. USE ALL K00–K03
PLEASE SELECT NO.(1) ? 2
COMBINATION 2. USE K00,K01 SELECTED
*** OPTION NO.3 ***
--- OSC1 SYSTEM CLOCK ---
1. CRYSTAL
2. CR
PLEASE SELECT NO.(1) ? 1
1. CRYSTAL SELECTED
4 Multiple key entry reset
Fig. 3.3.4
System reset circuit
The reset function is set when K00 through K03 are
entered.
When "NOT USE" is selected, the reset function is
not activated even if K00 through K03 are entered.
When "USE K00, K01" is selected, the system is
reset immediately the K00 and K01 inputs go high at
the same time. Similarly, the system is reset as soon
as the K00 through K02 inputs or the K00 through
K03 inputs go high.
However, the system is reset when a high signal is
input for more than a rule time (1–3 sec).
The system reset circuit is shown in Figure 3.3.4.
5 Interrupt noise rejector
Select whether noise rejector will be supplemented to
the input interrupter of K00–K03. When "USE" is
selected, the entry signal will pass the noise rejector,
and occurrence of interrupt errors due to noise or
chattering can be avoided. Note, however, that
because the noise rejector performs entry signal
sampling at 4 kHz, "NOT USE" should be selected
when high speed response is required.
OSC1
OSC2
K00
K01
K02
K03
RESET
Mask option
Oscillation
detection
circuit
f
Vss
Oscillation
circuit
3 OSC1 system clock
Select oscillation circuit that uses OSC1 and OSC2.
To minimize external components, CR oscillation
circuit would be suitable; to obtain a stable oscilla-
tion frequency, crystal oscillation circuit would be
suitable.
When CR oscillation circuit is selected, only resistors
are needed as external components since capacities
are built-in.
On the other hand, when crystal oscillation circuit is
selected, crystal oscillator and trimmer capacitor are
needed as external components. Although when
crystal oscillation circuit is selected, it is fixed at
32.768 kHz, when CR oscillation circuit is selected,
frequency may be modified to a certain extent
depending on the resistance of external components.