Freescale-semiconductor ColdFire MCF52210 Manual de usuario descargar pdf (Pagina 273)

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Edge Port Module (EPORT)

MCF52211 ColdFire® Integrated Microcontroller Reference Manual, Rev. 2

Freescale Semiconductor 16-5

16.4.4 Edge Port Data Register (EPDR)

The EPORT data register (EPDR) holds the data to be driven to the pins.

16.4.5 Edge Port Pin Data Register (EPPDR)

The EPORT pin data register (EPPDR) reflects the current state of the pins.

IPSBAR

Offset:

0x13_0004 (EPDR) Access: User read/write

76543210

EPD7 EPD6 EPD5 EPD4 EPD3 EPD2 EPD1

Reset:11111111

Figure 16-5. EPORT Port Data Register (EPDR)

Table 16-6. EPDR Field Descriptions

Field Description

7–1

EPDn

Edge Port Data Bits. An internal register stores data written to EPDR; if any pin of the port is configured as an output,

the bit stored for that pin is driven onto the pin. Reading EDPR returns the data stored in the register. Reset sets

EPD7–EPD1.

0 Reserved, must be cleared.

IPSBAR

Offset:

0x13_0005 (EPPDR) Access: User read-only

76543210

R EPPD7 EPPD6 EPPD5 EPPD4 EPPD3 EPPD2 EPPD1 0

Reset: [IRQ7] [IRQ6] [IRQ5] [IRQ4] [IRQ3] [IRQ2] [IRQ1]0

Figure 16-6. EPORT Port Pin Data Register (EPPDR)

Table 16-7. EPPDR Field Descriptions

Field Description

7–1

EPPDn

Edge port pin data bits. The read-only EPPDR reflects the current state of the EPORT pins IRQ7

–IRQ1. Writing to

EPPDR has no effect, and the write cycle terminates normally. Reset does not affect EPPDR.

0 Reserved, must be cleared.

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Freescale-semiconductor ColdFire MCF52210 Manual de usuario Pagina 273

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