MMCCMB2107 Freescale, MMCCMB2107 Datasheet - Page 103

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MMCCMB2107

Manufacturer Part Number
MMCCMB2107
Description
Manufacturer
Freescale
Datasheet

Specifications of MMCCMB2107

Lead Free Status / RoHS Status
Not Compliant
3.8.2 Chip Mode Selection
3.8.3 Boot Device Selection
MMC2107 – Rev. 2.0
MOTOROLA
The chip mode is selected during reset and reflected in the MODE field
of the chip configuration register (CCR). Once reset is exited, the
operating mode cannot be changed.
selection during reset configuration.
During reset, certain module configurations depend on whether
emulation mode is active as determined by the state of the internal
emulation signal.
During reset configuration, the CS0 chip select pin is optionally
configured to select an external boot device. In this case, the CSEN bit
in CSCR0 is set, enabling CS0 after reset. CS0 will be asserted for the
initial boot fetch accessed from address 0x0. It is assumed that the reset
vector loaded from address 0x0 causes the CPU to start executing from
external memory space decoded by CS0. Also, the PS bit is configured
for either a 16-bit or 32-bit port size depending on the external boot
device. See
In emulation mode, the CS1 chip select pin is optionally configured for
emulating an internal memory. In emulation mode and booting from
internal memory, the CSEN bit in CSCR1 is set, enabling CS1 after
reset.
Master mode
Single-chip mode
FAST mode
Emulation mode
1. Modifying the default configurations is possible only if the external RCON pin is asserted.
Chip Configuration
Freescale Semiconductor, Inc.
For More Information On This Product,
Mode
Chip Configuration Module (CCM)
Table 3-8. Chip Configuration Mode Selection
Table
Go to: www.freescale.com
3-9.
D26 driven high
D26 driven high
D26 driven high
D26 driven low
MODE2
CCR Register MODE Field
Table 3-8
D17 driven high
D17 driven high
D17 driven low
D17 don’t care
MODE1
Chip Configuration Module (CCM)
shows the mode
Functional Description
D16 driven high
D16 driven low
D16 don’t care
D16 don’t care
Technical Data
(1)
MODE0
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