MC9S12P128 Datasheet, PDF (109/564 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

S12P Memory Map Control (S12PMMCV1)
BDM
MMC
Address Decoder & Priority
CPU
DBG
Target Bus Controller
D-Flash
P-Flash
RAM
Peripherals
Figure 3-1. S12PMMC Block Diagram
3.2 External Signal Description
The S12PMMC uses two external pins to determine the devices operating mode: RESET and MODC
(Figure 3-4) See Device User Guide (DUG) for the mapping of these signals to device pins.
Pin Name
RESET
(See DUG)
MODC
(See DUG)
Table 3-4. External System Pins Associated With S12PMMC
Pin Functions
RESET
Description
The RESET pin is used the select the MCU’s operating mode.
MODC
The MODC pin is captured at the rising edge of the RESET pin. The captured
value determines the MCU’s operating mode.
3.3 Memory Map and Registers
3.3.1 Module Memory Map
A summary of the registers associated with the S12PMMC block is shown in Figure 3-2. Detailed
descriptions of the registers and bits are given in the subsections that follow.
S12P-Family Reference Manual, Rev. 1.12
Freescale Semiconductor
109