7 PRECAUTIONS ON MOUNTING
S1C33205 PRODUCT PART
EPSON
A-69
A-1
A-7
7
Precautions on Mounting
The following shows the precautions when designing the board and mounting the IC.
Oscillation Circuit
• Oscillation characteristics change depending on conditions (board pattern, components used, etc.).
In particular, when a ceramic oscillator or crystal oscillator is used, use the oscillator manufacturer's
recommended values for constants such as capacitance and resistance.
• 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 OSC3 (OSC1), OSC4 (OSC2) and PLLC pins, such as
oscillators, resistors and capacitors, should be connected in the shortest line.
(2) As shown in the figure below, make a V
SS
pattern as large as possible at circumscription of the OSC3
(OSC1) and OSC4 (OSC2) pins and the components connected to these pins. The same applies to the
PLLC pin.
Furthermore, do not use this V
SS
pattern to connect other components than the oscillation system.
OSC4
OSC3
V
SS
Sample V
SS
pattern
OSC3 and OSC4
V
SS
PLLC
V
SS
PLLC
(3) When supplying an external clock to the OSC3 (OSC1) pin, the clock source should be connected to the
OSC3 (OSC1) pin in the shortest line.
Furthermore, do not connect anything else to the OSC4 (OSC2) pin.
• In order to prevent unstable operation of the oscillation circuit due to current leak between OSC3 (OSC1) and
V
DD
, please keep enough distance between OSC3 (OSC1) and V
DD
or other signals on the board pattern.
Reset Circuit
• The power-on reset signal which is input to the #RESET pin changes depending on conditions (power rise
time, components used, board pattern, etc.). Decide the time constant of the capacitor and resistor after
enough tests have been completed with the application product.
• In order to prevent any occurrences of unnecessary resetting caused by noise during operating, components
such as capacitors and resistors should be connected to the #RESET pin in the shortest line.
Power Supply Circuit
• Sudden power supply variation due to noise may cause malfunction. Consider the following points to prevent
this:
(1) The power supply should be connected to the V
DD
, V
DDE
, V
SS
and AV
DDE
pins with patterns as short
and large as possible.
In particular, the power supply for AV
DDE
affects A/D conversion precision.
Summary of Contents for CMOS 32-Bit Single Chip Microcomputer S1C33L03
Page 4: ......
Page 14: ......
Page 15: ...S1C33L03 PRODUCT PART ...
Page 16: ......
Page 147: ...S1C33L03 FUNCTION PART ...
Page 148: ......
Page 149: ...S1C33L03 FUNCTION PART I OUTLINE ...
Page 150: ......
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 ...
Page 164: ......
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 ...
Page 264: ......
Page 266: ...III PERIPHERAL BLOCK INTRODUCTION B III 1 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
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 ...
Page 416: ......
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 ...
Page 436: ......
Page 438: ...V DMA BLOCK INTRODUCTION B V 1 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
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 ...
Page 494: ......
Page 531: ...S1C33L03 FUNCTION PART VII LCD CONTROLLER BLOCK ...
Page 532: ......
Page 579: ...S1C33L03 FUNCTION PART Appendix I O MAP ...
Page 580: ......