Processor Users Manual

MOTOROLA Chapter 35. Parallel I/O Ports 35-5

Part IV. Communications Processor Module

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

function). Table 35-4 describes PSORx Þelds.

NOTE

If the corresponding PPARx[DDx] = 1 (conÞgured as a general-purpose pin) before

programming a PSORx or PDIRx bit, a pin might function for a short period as an unwanted

dedicated function and cause unknown behavior.

Bits 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Field SO0

SO1

SO2

SO3

SO4 SO5 SO6 SO7 SO8 SO9 SO10 SO11 SO12 SO13 SO14 SO15

Reset 0000_0000_0000_0000

R/W R/W

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

Bits 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

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

Reset 0000_0000_0000_0000

R/W R/W

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

These bits are valid for PSORA and PSORC only

Figure 35-5. Special Options Registers (PSORAÐPOSRD)

Table 35-4. PSORx Field Descriptions

Bits Name Description

0Ð31 SOx Special-option. Determines whether a pin conÞgured for a dedicated function (PPARx[DDx] = 1) uses

option 1 or option 2. Note that bits SO0ÐSO3 are valid for PSORA and PSORC only. Options are

described in Section 35.2, ÒPort Registers.Ó

0 Dedicated peripheral function. Option 1.

1 Dedicated peripheral function. Option 2.