Specifications

S1C6S2N7 TECHNICAL HARDWARE EPSON I-19
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Oscillation Circuit)
CR oscillation circuit
The S1C6S2N7 Series has a CR oscillation circuit (typ. 65
kHz). Figure 4.2.2 is the block diagram of the CR oscillation
circuit.
Fig. 4.2.2
CR oscillation circuit
As Figure 4.2.2 indicates, the CR oscillation circuit can be
configured simply by connecting the register (R) between
pins OSC1 and OSC2 since capacity (C) is built-in.
See Chapter 6, "ELECTRICAL CHARACTERISTICS" for R
value.
OSC2
OSC1
C
To CPU and
peripheral circuits
The S1C6S2N7 Series
R
Oscillation Circuit
The S1C6S2N7 Series has a built-in crystal oscillation
circuit. This circuit generates the operating clock for the
CPU and peripheral circuit on connection to an external
crystal oscillator (typ. 32.768 kHz) and trimmer capacitor
(5–25 pF).
Figure 4.2.1 is the block diagram of the crystal oscillation
circuit.
4.2
Fig. 4.2.1
Crystal oscillation circuit
Crystal oscillation
circuit
As Figure 4.2.1 indicates, the crystal oscillation circuit can
be configured simply by connecting the crystal oscillator
(X'tal) between the OSC1 and OSC2 pins and the trimmer
capacitor (CG) between the OSC1 and VDD pins.
CG
X'tal
OSC2
OSC1
To CPU and
peripheral circuits
The S1C6S2N7 Series
VDD
R
f
RD
CD
VDD