Datasheet

Memory Map
MC68HC711D3 Data Sheet, Rev. 2.1
Freescale Semiconductor 29
2.3.2 RAM and I/O Mapping Register
The random-access memory (RAM) and input/output (I/O) mapping register (INIT) is a special-purpose
8-bit register that is used during initialization to change the default locations of RAM and control registers
within the MCU memory map. It can be written to only once within the first 64 E-clock cycles after a reset
in normal modes. Thereafter, it becomes a read-only register.
$003A
Arm/Reset COP Timer Circuitry
Register (COPRST)
See page 48.
Read:
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Write:
Reset:00000000
$003B
PROM Programming Control
Register (PPROG)
See page 32.
Read:
MBE 0 ELAT EXCOL EXROW 0 0 PGM
Write:
Reset:00000000
$003C
Highest Priority I-Bit Interrupt and
Miscellaneous Register (HPRIO)
See page 58.
Read:
RBOOT
SMOD
MDA IRVNE PSEL3 PSEL2 PSEL1 PSEL0
Write:
Reset: Note 1 0 1 0 1
1. The values of the RBOOT, SMOD, IRVNE, and MDA bits at reset depend on the mode during initialization. Refer to
Table 4-3. Hardware Mode Select Summary.
$003D
RAM and I/O Mapping Register
(INIT)
See page 29.
Read:
RAM3 RAM2 RAM1 RAM0 REG3 REG2 REG1 REG0
Write:
Reset:00000001
$003E
Test 1 Register
(TEST)
Read:
TILOP 0 OCC4 CBYP DISR FCM FCOP 0
Write:
Reset:00000000
$003F
System Configuration Register
(CONFIG)
See page 30.
Read:
00000NOCOPROMON0
Write:
Reset:00000UU0
Address: $003D
Bit 7654321Bit 0
Read:
RAM3 RAM2 RAM1 RAM0 REG3 REG2 REG1 REG0
Write:
Reset:00000000
Figure 2-3. RAM and I/O Mapping Register (INIT)
Addr. Register Name Bit 7654321Bit 0
= Unimplemented
R
= Reserved U = Unaffected
Figure 2-2. Register and Control Bit Assignments (Sheet 5 of 5)