MAC7200 datasheet(908/976 Pages) FREESCALE

908 / 976 page

Memory Map and Register Definition

MAC7200 Microcontroller Family Reference Manual, Rev. 2

830

Freescale Semiconductor

34.6.1.17 Double Port Wide Input Registers

There are several Double Port Wide Input Registers available that can be used to read the value of 2 ports

simultaneously. Each 32-bit register is read-only and will read back the synchronized value on the

corresponding pin. The following table lists these registers.

NOTE

The reset value of this register depends on the value of the pins at the time

of the first register READ after reset.

Offset see Table 34-11

Access: see Table 34-43

987

6543210

0000

0000000

000

Reset

0000

0000000

00000

Figure 34-18. Pin Configuration Register (CONFIG_RESET)

Table 34-42. CONFIG_RESET Field Descriptions

Field

Description

15–4

Reserved, should be cleared.

PULL

Pull-down Enable Register. This bit selects a pull-down device on the RESET pad. This bit is write once. Only

a Power on Reset will reset this bit.

No Pull-down

Pull-down Enabled

2–0

Reserved, should be cleared.

Table 34-43. CONFIG_RESET Allowed Register Accesses

8-bit

16-bit

32-bit

READ

Allowed

Not Allowed

WRITE

Allowed (once to [7:0])

Allowed (once)

Not Allowed

Table 34-44. Double Port Wide Input Registers (DPORTIR)

Address Offset

Ports

0x03e0

Port A / Port B

0x03e4

Port C / Port D

0x03e8

Port E / Port F

0x03ec

Port G / 0x0000

0x03f0

Port B / Port C

0x03f4

Port D / Port E

0x03f8

Port F / Port G

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