Chapter 3 Memory Mapping Control (S12ZMMCV1)
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
Freescale Semiconductor
117
3.1.4.2
Power modes
The S12ZMMC module is only active in run and wait mode.There is no bus activity in stop mode.
3.1.5
Block Diagram
e
Figure 3-1. S12ZMMC Block Diagram
3.2
External Signal Description
The S12ZMMC uses two external pins to determine the devices operating mode: RESET and MODC
(
)
See device overview for the mapping of these signals to device pins.
3.3
Memory Map and Register Definition
3.3.1
Memory Map
A summary of the registers associated with the MMC block is shown in
. Detailed descriptions
of the registers and bits are given in the subsections that follow.
Table 3-3. External System Pins Associated With S12ZMMC
Pin Name
Description
RESET
External reset signal. The RESET signal is active low.
MODC
This input is captured in bit MODC of the MODE register when the external RESET pin deasserts.
Memory Protection
Crossbar Switch
Register
Block
Ru
n Mo
de Con
trol
ler
S12ZCPU
S12ZBDC
ADC
EEPROM
RAM
Peripherals
Program
Flash
