MMC2107 - Freescale Semiconductor

Freescale Semiconductor, Inc.
Chip Configuration Module (CCM)
Functional Description
3.8.4 Output Pad Strength Configuration
Output pad strength is determined during reset configuration as shown
in Table 3-11. Once reset is exited, the output pad strength configuration
can be changed by programming the LOAD bit of the chip configuration
register.
Table 3-11. Output Pad Driver Strength Selection (1)
Optional Pin Function Selection
CCR Register LOAD Bit
nc...
Freescale Semiconductor, I
3.8.5 Clock Mode Selection
Clock Mode
Output pads configured for default strength
Output pads configured for full strength
D21 driven low
D2 driven high
1. Modifying the default configurations is possible only if the external RCON pin is asserted
low.
The clock mode is selected during reset and reflected in the PLLMODE,
PLLSEL, and PLLREF bits of SYNSR. Once reset is exited, the clock
mode cannot be changed.
Table 3-12 summarizes clock mode selection during reset configuration.
Table 3-12. Clock Mode Selection (1)
Synthesizer Status Register (SYNSR)
MODE Bit PLLSEL Bit PLLREF Bit
External clock mode; PLL disabled V DDSYN driven low D23 don’t care D22 don’t care
1:1 PLL mode V DDSYN driven high D23 driven low D22 don’t care
Normal PLL mode; external clock reference V DDSYN driven high D23 driven high D22 driven low
Normal PLL mode; crystal oscillator reference V DDSYN driven high D23 driven high D22 driven high
1. Modifying the default configurations is possible only if the external RCON pin is asserted low.
MMC2107 – Rev. 2.0
Technical Data
MOTOROLA Chip Configuration Module (CCM) 105
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