
Edge Port Module (EPORT)
15-2
Freescale Semiconductor
15.2
Low-Power Mode Operation
This section describes the operation of the EPORT module in low-power modes. For more information on
low-power modes, see
Chapter 8, “Power Management”.
shows EPORT-module operation in
low-power modes and describes how this module may exit each mode.
NOTE
The wakeup control register (WCR) in the system control module specifies
the interrupt level at or above what is needed to bring the device out of a
low-power mode.
In wait and doze modes, the EPORT module continues to operate as it does in run mode. It may be
configured to exit the low-power modes by generating an interrupt request on a selected edge or a low level
on an external pin. In stop mode, no clocks are available to perform the edge-detect function. Only the
level-detect logic is active (if configured) to allow any low level on the external interrupt pin to generate
an interrupt (if enabled) to exit stop mode.
NOTE
In stop mode, the input pin synchronizer is bypassed for the level-detect
logic because no clocks are available.
15.3
Interrupt/GPIO Pin Descriptions
All EPORT pins default to general-purpose input pins at reset. The pin value is synchronized to the rising
edge of FB_CLK when read from the EPORT pin data register (EPPDR). The values used in the edge/level
detect logic are also synchronized to the rising edge of FB_CLK. These pins use Schmitt-triggered input
buffers with built-in hysteresis designed to decrease the probability of generating false, edge-triggered
interrupts for slow rising and falling input signals.
When a pin is configured as an output, it is driven to a state whose level is determined by the corresponding
bit in the EPORT data register (EPDR). All bits in the EPDR are set at reset.
15.4
Memory Map/Register Definition
This subsection describes the memory map and register structure. Refer to
the EPORT memory map.
Table 15-1. Edge Port Module Operation in Low-Power Modes
Low-power Mode
EPORT Operation
Mode Exit
Wait
Normal
Any IRQn interrupt at or above level in WCR
Doze
Normal
Any IRQn interrupt at or above level in WCR
Stop
Level-sensing only
Any IRQn interrupt set for level-sensing at or
above level in WCR. See note below.
MCF5329 Reference Manual, Rev 3
Summary of Contents for MCF5329
Page 106: ...ColdFire Core 3 32 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 148: ...Cache 5 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 154: ...Static RAM SRAM 6 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 184: ...Power Management 8 18 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 204: ...Reset Controller Module 10 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 220: ...System Control Module SCM 11 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 228: ...Crossbar Switch XBS 12 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 268: ...General Purpose I O Module 13 40 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 392: ...SDRAM Controller SDRAMC 18 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 436: ...Fast Ethernet Controller FEC 19 44 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 594: ...FlexCAN 23 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 678: ...Pulse Width Modulation PWM Module 26 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 684: ...Watchdog Timer Module 27 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 704: ...DMA Timers DTIM0 DTIM3 29 12 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 754: ...UART Modules 31 34 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 770: ...I2 C Interface 32 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 866: ...Debug Module 36 50 Freescale Semiconductor MCF5329 Reference Manual Rev 3...