Chapter 23 Memory Mapping Control (S12XMMCV2)
MC9S12XDP512 Data Sheet, Rev. 2.11
Freescale Semiconductor 883
Table 1-2 and Table 1-3 outline the pin names and functions. It also provides a brief description of theiroperation.

Table 23-1. External Input Signals Associated with the MMC

Signal I/O Description Availability
MODC I Mode input Latched after
RESET (active low)
MODB I Mode input
MODA I Mode input
EROMCTL I EROM control input
ROMCTL I ROM control input

Table 23-2. External Output Signals Associated with the MMC

Signal I/O Description
Available in Modes
NS SS NX ES EX ST
CS0 O Chip select line 0 (see Table 1-4)
CS1 O Chip select line 1
CS2 O Chip select line 2
CS3 O Chip select line 3