mcf5272 Freescale Semiconductor, Inc, mcf5272 Datasheet - Page 173

• Manufacturer Part Number: mcf5272
• Description: Mcf5272 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

MOTOROLA
15-11
Bits
7-6
21
20
19
18
17
16
10
9
8
5
UART1PDN UART1 power-down enable. Controls the clocking to the UART1 module. Clocking to the
UART0PDN UART0 power-down enable. Controls the clocking to the UART0 module. Clocking to the
TIMERPDN Timer power-down enable. Controls the clocking to the timer module.
UART1WK
UART0WK
QSPIPDN
GPIOPDN
USBPDN
USBWK
Field
MOS
—
—
QSPI power-down enable. Controls the clocking to the QSPI module.
0 Clock enabled.
1 Clock disabled.
0 Clock enabled.
1 Clock disabled.
Parallel port power-down enable. Controls the clocking to the parallel port module.
0 Clock enabled.
1 Clock disabled.
USB power-down enable. Controls the clocking to the USB module. Clocking to the USB
module may be turned on by USD_D+ or INT1/USB_WOR, at which time this bit is
automatically cleared.
0 Clock enabled.
1 Clock disabled.
UART1 module may be restored when a change in signal level is detected on UART1RxD, at
which time this bit is automatically cleared.
0 Clock enabled.
1 Clock disabled.
UART0 module may be restored when a change in signal level is detected on UART0RxD, at
which time this bit is automatically cleared.
0 Clock enabled.
1 Clock disabled.
Reserved, should be cleared.
USB wakeup enable. Allows clocking to the USB module to be restored when a change in
signal level is detected on USD_D+ or INT1/USB_WOR. See Table 6-6 for a description of the
interaction between the PDN and WK bits.
0 Wakeup disabled.
1 Wakeup enabled. USBPDN must also be set.
UART1 wakeup enable. Allows clocking to the UART1 module to be restored when a change in
signal level is detected on UART1RxD. See Table 6-6 for a description of the interaction
between the PDN and WK bits.
0 Wakeup disabled.
1 Wakeup enabled. UART1PDN must also be set.
UART0 wakeup enable. Allows clocking to the UART0 module to be restored when a change in
signal level is detected on UART0RxD. See Table 6-6 for a description of the interaction
between the PDN and WK bits.
0 Wakeup disabled.
1 Wakeup enabled. UART0PDN must also be set.
Reserved, should be cleared.
Main oscillator stop. Allows the MCF5272 to be put into stop mode, in which internal clocking is
stopped to the entire processor. To enter stop mode, the user must write to the ALPR and then
execute a STOP instruction. See Section 6.2.6, “Activate Low-Power Register (ALPR).” It is not
necessary to put any on-chip modules in power down mode. After setting this bit, a write
access must be made to the ALPR register to actually enter stop mode. D[31:0] are driven low,
and other bus signals are negated. Stop mode is exited when an interrupt is detected on one
the external interrupt pins, INT[6:1].
0 Stop mode disabled.
1 Stop mode enabled.
Table 6-5. PMR Field Descriptions (Continued)
Chapter 6. System Integration Module (SIM)
Description
Programming Model
6-9