
5-4
ML63326 User's Manual
Chapter 5 Clock Generator Circuit (OSC)
5.4 High-Speed Clock Generator Circuit
The high-speed clock generator circuit has two modes, the RC oscillation mode and crystal
oscillation mode. Oscillation modes are set by OSCSEL (bit 2 of FCON).
•
OSCSEL = "0" : RC oscillation mode
•
OSCSEL = "1" : crystal oscillation mode
During the RC oscillation mode, the source oscillation clock is output as the high-speed clock.
The maximum frequency in this case is 2.048 MHz.
During the crystal oscillation mode, the half frequency waveform of the source oscillations is
output as the high-speed clock. The maximum frequency of the source oscillations in this
case is 4.096 MHz.
If the high-speed clock is not to be used, leave the OSC0 and OSC1 pins open (unconnected).
For the RC oscillation mode, attach an external resistor, R
OSH
, as shown in Figure 5-3(a).
For the crystal oscillation mode, attach an external crystal unit and capacitors as shown in
Figure 5-3(b).
(a) External Circuit for RC Oscillation Mode
OSC1
OSC0
(b) External Circuit for Crystal Oscillation Mode
V
DDH
V
DDH
R
OSH
High-speed
clock output
High-speed
clock output
Oscillation
enable
V
SS
C
L1
C
L0
V
DDH
V
DDH
Oscillation enable
Crystal
OSC1
OSC0
Q
D
Q
Figure 5-3 External Circuits for High-Speed Clock Oscillation
Summary of Contents for ML63326
Page 3: ......
Page 13: ......
Page 14: ...Chapter 1 Overview 1 ...
Page 15: ......
Page 37: ...1 22 ML63326 User s Manual Chapter 1 Overview ...
Page 38: ...Chapter 2 CPU and Memory Spaces 2 ...
Page 39: ......
Page 50: ...CPU Control Functions Chapter 3 3 ...
Page 51: ......
Page 57: ...3 6 ML63326 User s Manual Chapter 3 CPU Control Functions ...
Page 58: ...Interrupt INT326 Chapter 4 4 ...
Page 59: ......
Page 71: ...4 12 ML63326 User s Manual Chapter 4 Interrupt INT326 ...
Page 72: ...Clock Generator Circuit OSC Chapter 5 5 ...
Page 73: ......
Page 83: ...5 10 ML63326 User s Manual Chapter 5 Clock Generator Circuit OSC ...
Page 84: ...Time Base Counter TBC Chapter 6 6 ...
Page 85: ......
Page 90: ...Timers TIMER Chapter 7 7 ...
Page 91: ......
Page 115: ...7 24 ML63326 User s Manual Chapter 7 Timers TIMER ...
Page 116: ...Chapter 8 8 100 Hz Timer Counter 100HzTC ...
Page 117: ......
Page 121: ...8 4 ML63326 User s Manual Chapter 8 100 Hz Timer Counter 100HzTC ...
Page 122: ...Chapter 9 9 Watchdog Timer WDT ...
Page 123: ......
Page 128: ...Chapter 10 10 Ports INPUT OUTPUT I O PORT ...
Page 129: ......
Page 170: ...Chapter 11 11 External Memory Transfer Function EXTMEM ...
Page 171: ......
Page 179: ...11 8 ML63326 User s Manual Chapter 11 External Memory Transfer Function EXTMEM ...
Page 180: ...Chapter 12 12 Melody Driver MELODY63K ...
Page 181: ......
Page 195: ...12 14 ML63326 User s Manual Chapter 12 Melody Driver MELODY63K ...
Page 196: ...13 Chapter 13 Voice Synthesis ...
Page 197: ......
Page 228: ...14 Chapter 14 Shift Register SFT ...
Page 229: ......
Page 236: ...15 Chapter 15 LCD Driver LCD ...
Page 237: ......
Page 250: ...16 Chapter 16 Battery Low Detect Circuit BLD ...
Page 251: ......
Page 255: ...16 4 ML63326 User s Manual Chapter 16 Battery Low Detect Circuit BLD ...
Page 256: ...Chapter 17 17 Power Supply Circuit POWER ...
Page 257: ......
Page 260: ...Appendixes ...
Page 261: ......
Page 321: ...Appendix 60 ML63326 User s Manual Appendix G ...