Table 8-4 Global Peripheral Control Register Description - Motorola DragonBall MC9328MX1 Reference Manual

Table 8-4. Global Peripheral Control Register Description
Name
Reserved Reserved—These bits are reserved and should read 0.
Bits 31–16
TEST_EN_REG Test Enable Register - Active high of this bit switches
Bit 15 the internal test signals from MEMC to GPIO for
debug purposes.
Reserved Reserved—These bits are reserved and should read 0.
Bits 14–13
BTAEN BTA Clock Input Control—Controls the clock input
Bit 12 signals to the BTA module. When the bit is clear,
clock inputs to the BTA are stopped for power saving.
When this bit is set, clock inputs to the BTA are
enabled.
DS_SLOW Driving Strength Slow I/O—Controls the driving
Bits 11–10 strength of all slow I/O signals.
DS_CNTL Driving Strength Bus Control Signal—Controls the
Bits 9–8 driving strength of bus control signals.
DS_ADDR Driving Strength Address Bus—Controls the driving
Bits 7–6 strength of the address bus.
DS_DATA Driving Strength Data Bus—Controls the driving
Bits 5–4 strength of the data bus.
Reserved Reserved—This bit must be set to 1 at all times for normal operation.
Bit 3
Reserved Reserved—This bit is reserved and should read 0.
Bit 2
MMA_PROT_EN MMA Privileged Mode Access—Selects whether the
Bit 1 MMA can only be accessed in privileged mode or if it
can be accessed in all modes.
CSI_PROT_EN CMOS Sensor Interface Privileged Mode
Bit 0 Access—Selects whether the CSI can only be
accessed in privileged mode or if it can be accessed
in all modes.
MOTOROLA
Description
System Control
Programming Model
Settings
0 = Normal
1 = Switches MEMC inner test
signals to GPIO for debug
purposes.
0 = Clock inputs to BTA disabled
1 = Clock inputs to BTA enabled
00 = 26 MHz/15 pF
01 = 26 MHz/30 pF
10 = 26 MHz/45 pF
11 = 26 MHz/greater than 45 pF
00 = 50 MHz/15 pF
01 = 50 MHz/30 pF
10 = 100 MHz/15 pF
11 = 100 MHz/30 pF
00 = 50 MHz/15 pF
01 = 50 MHz/30 pF
10 = 100 MHz/15 pF
11 = 100 MHz/30 pF
00 = 50 MHz/15 pF
01 = 50 MHz/30 pF
10 = 100 MHz/15 pF
11 = 100 MHz/30 pF
0 = All access modes available
1 = Privileged mode access only
0 = All access modes available
1 = Privileged mode access only
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