
5-8
ML63326 User's Manual
Chapter 5 Clock Generator Circuit (OSC)
5.7 System Clock Select Timing
After system reset, the system clock is TBCCLK.
When high-speed operation is necessary, switch the system clock to HSCLK.
A flowchart of system clock operation is shown below.
TBCCLK
(Low-speed clock generator circuit output)
System clock status
HSCLK
(High-speed clock generator circuit output)
After system reset, the low-
speed clock generator output
is the system clock.
OSCSEL (bit 2 of FCON) setting
(1) High-speed clock oscillation mode select
OSCSEL = "0" : RC oscillation mode
(initial value)
OSCSEL = "1" : Crystal oscillation mode
ENOSC (bit 1 of FCON) = "0"
(2) High-speed clock oscillation stop
ENOSC = "0" : Stop high-speed clock oscillation
(initial value)
ENOSC = "1" : Start high-speed clock oscillation
Software processing
Software processing
ENOSC (bit 1 of FCON) = "1"
(2) High-speed clock oscillation start
ENOSC = "0" : Stop high-speed clock oscillation
(initial value)
ENOSC = "1" : Start high-speed clock oscillation
Wait:
When RC oscillation mode selected:
5 ms or more
When crystal oscillation mode selected:
10 ms or more
CPUCLK (bit 0 of FCON) = "1"
(3) High-speed clock oscillation output select
CPUCLK = "0" : Low-speed clock oscillation output
(initial value)
CPUCLK = "1" : High-speed clock oscillation output
CPUCLK (bit 0 of FCON) = "0"
(1) Low-speed clock oscillation output select
CPUCLK = "0" : Low-speed clock oscillation output
(initial value)
CPUCLK = "1" : High-speed clock oscillation output
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 ...