MMC2107 Datasheet, PDF (248/618 Pages) –

Ports Module
Freescale Semiconductor, Inc.
11.2 Introduction
Many of the pins associated with the external interface may be used for
several different functions. Their primary function is to provide an
external interface to access off-chip resources. When not used for their
primary functions, many of the pins may be used as digital input/output
(I/O) pins. In some cases, the pin function is set by the operating mode,
and the alternate pin functions are not supported.
To facilitate the digital I/O function, these pins are grouped into 8-bit
ports. Each port has registers that configure the pins for the desired
function, monitor the pins, and control the pins within the ports.
PORT A
D[31:24] / PA[7:0]
PORT B
D[23:16] / PB[7:0]
PORT F
PORT G
R/W / PF7⁽¹⁾
A[22:16] / PF[6:0]⁽¹⁾
A[15:8] / PG[7:0]⁽¹⁾
PORT C
D[15:8] / PC[7:0]
PORT H
A[7:0] / PH[7:0]⁽¹⁾
PORT D
D[7:0] / PD[7:0]
PORT I
EB[3:0] / PI[7:4]⁽¹⁾
CS[3:0]/ PI[3:0]⁽¹⁾
PORT E
SHS / RCON / PE7
TA / PE6
TEA / PE5
CSE[1:0] / PE[4:3]⁽¹⁾
TC[2:0] / PE[2:0]⁽¹⁾
Note 1. These pins are found only on the 144-pin package.
Figure 11-1. Ports Module Block Diagram
Technical Data
248
Ports Module
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MMC2107 – Rev. 2.0
MOTOROLA