MC9S12GRMV1 Datasheet, PDF (267/1292 Pages) Freescale Semiconductor, Inc – MC9S12G Family Reference Manual and Data Sheet

S12G Memory Map Controller (S12GMMCV1)
BDM
MMC
Address Decoder & Priority
CPU
DBG
Target Bus Controller
EEPROM
Flash
RAM
Peripherals
Figure 5-1. S12GMMC Block Diagram
5.2 External Signal Description
The S12GMMC uses two external pins to determine the devices operating mode: RESET and MODC
(Figure 5-3) See Device User Guide (DUG) for the mapping of these signals to device pins.
Pin Name
RESET
(See Section
Device Overview)
MODC
(See Section
Device Overview)
Table 5-3. External System Pins Associated With S12GMMC
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.
5.3 Memory Map and Registers
5.3.1 Module Memory Map
A summary of the registers associated with the S12GMMC block is shown in Figure 5-2. Detailed
descriptions of the registers and bits are given in the subsections that follow.
MC9S12G Family Reference Manual, Rev.1.23
Freescale Semiconductor
269