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User’s Manual 319
C.2 System/User Mode Registers
Table C-3 lists the new I/O registers added to support the System/User mode.
The Enable Dual Mode Register (EDMR) is used to enable and disable the System/User
mode. All other I/O registers listed in the table are “User mode enable” registers for each
peripheral. On startup, User mode access is not allowed to all the peripherals (all writes to
I/O registers for that peripheral are ignored), but can be enabled by writing to the appropri-
ate register. Note that User mode writes to all other I/O registers are always ignored.
Table C-3. System/User Mode I/O Registers
Register Name Mnemonic
I/O
Address
R/W Reset
Enable Dual-Mode Register EDMR 0x0420 W 00000000
Real Time Clock User Enable Register RTUER 0x0300 W 00000000
Slave Port User Enable Register SPUER 0x0320 W 00000000
Parallel Port A User Enable Register PAUER 0x0330 W 00000000
Parallel Port B User Enable Register PBUER 0x0340 W 00000000
Parallel Port C User Enable Register PCUER 0x0350 W 00000000
Parallel Port D User Enable Register PDUER 0x0360 W 00000000
Parallel Port E User Enable Register PEUER 0x0370 W 00000000
Parallel Port F User Enable Register PFUER 0x0338 W 00000000
Parallel Port G User Enable Register PGUER 0x0348 W 00000000
Input Capture User Enable Register ICUER 0x0358 W 00000000
I/O Bank User Enable Register IBUER 0x0380 W 00000000
PWM User Enable Register PWUER 0x0388 W 00000000
Quad Decode User Enable Register QDUER 0x0390 W 00000000
External Interrupt User Enable Register IUER 0x0398 W 00000000
Timer A User Enable Register TAUER 0x03A0 W 00000000
Timer B User Enable Register TBUER 0x03B0 W 00000000
Serial Port A User Enable Register SAUER 0x03C0 W 00000000
Serial Port B User Enable Register SBUER 0x3D0 W 00000000
Serial Port C User Enable Register SCUER 0x3E0 W 00000000
Serial Port D User Enable Register SDUER 0x3F0 W 00000000
Serial Port E User Enable Register SEUER 0x03C8 W 00000000
Serial Port F User Enable Register SFUER 0x3D8 W 00000000