mc9s12vr48 Freescale Semiconductor, Inc, mc9s12vr48 Datasheet - Page 105

• Manufacturer Part Number: mc9s12vr48
• Description: S12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

3.2
The S12GMMC uses two external pins to determine the devices operating mode: RESET and MODC
(Figure
3.3
3.3.1
A summary of the registers associated with the S12GMMC block is shown in
descriptions of the registers and bits are given in the subsections that follow.
Freescale Semiconductor
Device Overview)
Device Overview)
(See Section
(See Section
Pin Name
RESET
MODC
3-3) See Device User Guide (DUG) for the mapping of these signals to device pins.
External Signal Description
Memory Map and Registers
Module Memory Map
MMC
Pin Functions
EEPROM
Table 3-3. External System Pins Associated With S12GMMC
RESET
MODC
BDM
MC9S12VR Family Reference Manual, Rev. 2.2
Address Decoder & Priority
Preliminary - Subject to Change Without Notice
Figure 3-1. S12GMMC Block Diagram
Target Bus Controller
The RESET pin is used the select the MCU’s operating mode.
The MODC pin is captured at the rising edge of the RESET pin. The captured
value determines the MCU’s operating mode.
Flash
RAM
Description
CPU
Peripherals
S12G Memory Map Controller (S12GMMCV1)
Figure
DBG
3-2. Detailed
105