MPC8280 datasheet(1321/1386 Pages) FREESCALE

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Parallel I/O Ports

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

Freescale Semiconductor

41-5

PSOR bits are effective only if the corresponding PPARx[DDx] = 1 (a dedicated peripheral function).

Table 41-4 describes PSORx fields.

NOTE

Program PSORx and PDIRx before programming PPARx to ensure desired

functions are configured when PPARx bits are set. Otherwise, a pin might

function for a short period as an unwanted dedicated function and cause

unknown behavior.

123

Field SO01 SO11 SO21 SO31 SO4

SO5

SO6

SO7

SO8

SO9 SO10 SO11 SO12 SO13 SO14 SO15

Reset

0000_0000_0000_0000

R/W

Addr

0x10D08 (PSORA), 0x10D28 (PSORB), 0x10D48 (PSORC), 0x10D68 (PSORD)

Field SO16 SO17 SO18 SO19 SO20 SO21 SO22 SO23 SO24 SO25 SO26 SO27 SO28 SO29 SO30 SO31

Reset

0000_0000_0000_0000

R/W

Addr

0x10D0A (PSORA), 0x10D2A (PSORB), 0x10D4A (PSORC), 0x10D6A (PSORD)

1 These bits are valid for PSORA and PSORC only

Figure 41-5. Special Options Registers (PSORA–POSRD)

Table 41-4. PSOR

x Field Descriptions

Bits

Name

Description

0–31

Special-option. Determines whether a pin configured for a dedicated function (PPAR

x[DDx] = 1)

uses option 1 or option 2. Note that bits SO0–SO3 are valid for PSORA and PSORC only. Options

are described in Section 41.2, “Port Registers.”

0 Dedicated peripheral function. Option 1.

1 Dedicated peripheral function. Option 2.

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