III PERIPHERAL BLOCK: LOW-SPEED (OSC1) OSCILLATION CIRCUIT
B-III-6-2
EPSON
S1C33L03 FUNCTION PART
Oscillator Types
In the low-speed (OSC1) oscillation circuit, either a crystal oscillation or an external clock input can be selected as
the type of oscillation circuit.
Figure 6.2 shows the structure of the low-speed (OSC1) oscillation circuit.
V
SS
OSC2
OSC1
R
f
C
D1
C
G1
Oscillation circuit
control signal
Oscillation circuit
control signal
X'tal1
f
OSC1
OSC2
OSC1
External
clock
N.C.
V
SS
V
DD
f
OSC1
(1) Crystal oscillation circuit
V
SS
OSC2
OSC1
Oscillation circuit
control signal
Low level
(3) When not used
(2) External clock input
Figure 6.2 Low-Speed (OSC1) Oscillation Circuit
When using a crystal oscillation for this circuit, connect a crystal resonator X'tal1 (32.768 kHz, Typ.) and feedback
resistor (Rf) between the OSC1 and OSC2 pins, and two capacitors (C
G1
, C
D1
) between the OSC1 pin and V
SS
and
the OSC2 pin and V
SS
, respectively.
When an external clock source is used, leave the OSC2 pin open and input a square-wave clock to the OSC1 pin.
If the low-speed (OSC1) oscillation circuit is not used, connect the OSC1 pin to V
SS
and leave the OSC2 pin open.
The oscillation frequency is 32.768 kHz (Typ.). Use a crystal resonator or external clock that oscillates at this
frequency. No other frequency can be used for clock applications.
For details on oscillation characteristics and the external clock input characteristics, refer to "Electrical
Characteristics".
Summary of Contents for CMOS 32-Bit Single Chip Microcomputer S1C33L03
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Page 15: ...S1C33L03 PRODUCT PART ...
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Page 147: ...S1C33L03 FUNCTION PART ...
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Page 149: ...S1C33L03 FUNCTION PART I OUTLINE ...
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Page 152: ...I OUTLINE INTRODUCTION B I 1 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 162: ...I OUTLINE LIST OF PINS B I 3 8 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 163: ...S1C33L03 FUNCTION PART II CORE BLOCK ...
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Page 166: ...II CORE BLOCK INTRODUCTION B II 1 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 172: ...II CORE BLOCK CPU AND OPERATING MODE B II 2 6 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 176: ...II CORE BLOCK INITIAL RESET B II 3 4 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 224: ...II CORE BLOCK BCU Bus Control Unit B II 4 48 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 262: ...II CORE BLOCK DBG Debug Unit B II 7 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 263: ...S1C33L03 FUNCTION PART III PERIPHERAL BLOCK ...
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Page 322: ...III PERIPHERAL BLOCK WATCHDOG TIMER B III 5 4 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 415: ...S1C33L03 FUNCTION PART IV ANALOG BLOCK ...
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Page 418: ...IV ANALOG BLOCK INTRODUCTION B IV 1 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 434: ...IV ANALOG BLOCK A D CONVERTER B IV 2 16 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 435: ...S1C33L03 FUNCTION PART V DMA BLOCK ...
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Page 492: ...V DMA BLOCK IDMA Intelligent DMA B V 3 18 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 493: ...S1C33L03 FUNCTION PART VI SDRAM CONTROLLER BLOCK ...
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Page 531: ...S1C33L03 FUNCTION PART VII LCD CONTROLLER BLOCK ...
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Page 579: ...S1C33L03 FUNCTION PART Appendix I O MAP ...
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