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1745D–ATARM–04-Nov-05
AT91M55800A
12.9.10 APMC Status Register
Register Name: APMC_SR
Access Type: Read-only
Offset: 0x30
• MOSCS: Main Oscillator Status (Code Label APMC_MOSCS)
0 = Main Oscillator output signal is not stabilized or the Main Oscillator is disabled.
1 = The Main Oscillator is enabled and its output is stabilized. Actually, this bit indicates that the Main Oscillator counter
reached 0.
• LOCK: PLL Lock Status (Code Label APMC_PLL_LOCK)
0 = PLL output signal or main oscillator output signal is not stabilized, or the main oscillator is disabled.
1 = Main Oscillator is enabled and its output is stabilized and the PLL output signal is stabilized. Actually, this bit is set
when the PLL Lock Counter reaches 0.
12.9.11 APMC Interrupt Enable Register
Register Name: APMC_IER
Access Type: Write-only
Offset: 0x34
• MOSCS: Main Oscillator Interrupt Enable (Code Label APMC_MOSCS)
0 = No effect.
1 = Enables the Main Oscillator Stabilized Interrupt.
• LOCK: PLL Lock Interrupt Enable (Code Label APMC_PLL_LOCK)
0 = No effect.
1 = Enables the PLL Lock Interrupt.
31 30 29 28 27 26 25 24
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76543210
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LOCK MOSCS
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76543210
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LOCK MOSCS