Programming Model
MOTOROLA
Phase-Locked Loop and Clock Controller
12-7
SPLL_
RESTART
Bit 22
SPLL Restart
—Restarts System PLL at new
assigned frequency. SPLL_RESTART self-clears
after 1 (min) or 2 (max) cycles of CLK32.
0 = No Effect
1 = Restarts System PLL at new frequency
MPLL_
RESTART
Bit 21
MPLL Restart
—Restarts the MCU PLL at a new
assigned frequency. MPLL_RESTART self-clears
after 1 (min) or 2 (max) cycles of CLK32.
0 = No Effect
1 = Restarts MCU PLL at new frequency
Reserved
Bits 20
–
19
Reserved—These bits are reserved and should read 0.
CLK16_SEL
Bit 18
CLK16 Select
—Selects the clock source of the
16 MHz clock. When set, RFBTCLK16 is selected.
When cleared, the 16 MHz clock from OSC16 is
selected.
0 = Selects the external 16 MHz oscillator
source
1 = Selects the Bluetooth reference clock
RFBTCLK16
OSC_EN
Bit 17
Oscillator Enable
—Enables the 16 MHz oscillator
circuit when set (available when using an external
crystal input). When clear, the oscillator circuit
control is disabled which bypasses the oscillator
circuit when using external clock input.
0 = Disable the external 16 MHz oscillator
circuit
1 = Enable the external 16 MHz oscillator
circuit
System_SEL
Bit 16
System Select
—Selects the clock source of the
System PLL input. When set, the external high
frequency clock input is selected.
0 = Clock source is the internal premultiplier
1 = Clock source is the external high
frequency clock
PRESC
Bit 15
Prescaler
—Defines the MPU PLL clock prescaler.
0 = Prescaler divides by 1
1 = Prescaler divides by 2
Reserved
Bit 14
Reserved—This bit is reserved and should read 0.
BCLK_DIV
Bits 13
–
10
BClock Divider
—Contains the 4-bit integer divider
values for the generation of the BCLK.
0000 = BCLK divided by 1
0001 = BCLK divided by 2
...
1111 = BCLK divided by 16
Reserved
Bits 9–2
Reserved—These bits are reserved and should read 0.
SPEN
Bit 1
System PLL Enable
—Enables/Disables the
System PLL. When software writes 0 to SPEN, the
System PLL shuts down after SDCNT times out.
SPEN sets automatically when SPLLEN asserts,
and on system reset.
0 = System PLL disabled
1 = System PLL enabled
MPEN
Bit 0
MCU PLL Enable
—Enables/Disables the MCU
PLL. When cleared, the MCU PLL is disabled.
When software writes 0 to MPEN, the PLL shuts
down immediately. MPEN sets automatically when
MPLLEN asserts, and on system reset.
0 = MCU PLL disabled
1 = MCU PLL enabled
Table 12-5. Clock Source Control Register Description (Continued)
Name
Description
Settings
Summary of Contents for DragonBall MC9328MX1
Page 68: ...1 12 MC9328MX1 Reference Manual MOTOROLA Introduction ...
Page 86: ...2 18 MC9328MX1 Reference Manual MOTOROLA Signal Descriptions and Pin Assignments ...
Page 116: ...3 30 MC9328MX1 Reference Manual MOTOROLA Memory Map ...
Page 126: ...4 10 MC9328MX1 Reference Manual MOTOROLA ARM920T Processor ...
Page 160: ...8 8 MC9328MX1 Reference Manual MOTOROLA System Control ...
Page 272: ...13 32 MC9328MX1 Reference Manual MOTOROLA DMA Controller ...
Page 281: ...Programming Model MOTOROLA Watchdog Timer Module 14 9 ...
Page 282: ...14 10 MC9328MX1 Reference Manual MOTOROLA Watchdog Timer Module ...
Page 300: ...15 18 MC9328MX1 Reference Manual MOTOROLA Analog Signal Processor ASP ...
Page 438: ...18 16 MC9328MX1 Reference Manual MOTOROLA Serial Peripheral Interface Modules SPI 1 and SPI 2 ...
Page 478: ...19 40 MC9328MX1 Reference Manual MOTOROLA LCD Controller ...
Page 574: ...21 32 MC9328MX1 Reference Manual MOTOROLA Memory Stick Host Controller MSHC Module ...
Page 598: ...23 16 MC9328MX1 Reference Manual MOTOROLA Real Time Clock RTC ...
Page 670: ...24 72 MC9328MX1 Reference Manual MOTOROLA SDRAM Memory Controller ...
Page 726: ...25 56 MC9328MX1 Reference Manual MOTOROLA SmartCard Interface Module SIM ...
Page 736: ...26 10 MC9328MX1 Reference Manual MOTOROLA General Purpose Timers ...
Page 854: ...29 18 MC9328MX1 Reference Manual MOTOROLA I2C Module ...
Page 900: ...30 46 MC9328MX1 Reference Manual MOTOROLA Synchronous Serial Interface SSI ...
Page 942: ...32 26 MC9328MX1 Reference Manual MOTOROLA GPIO Module and I O Multiplexer IOMUX ...