SPMC68CK338CPV14 datasheet(32/133 Pages) FREESCALE

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MOTOROLA

MC68CK338

MC68CK338TS/D

Table 19 shows pin assignment field encoding. Pins that have no discrete output function do not use

the %00 encoding.

CSPAR0 contains seven 2-bit fields that determine the functions of corresponding chip-select pins.

CSPAR0[15:14] are not used. These bits always read zero; writes have no effect. CSPAR0 bit 1 always

reads one; writes to CSPAR0 bit 1 have no effect. Table 20 shows CSPAR0 pin assignments.

Table 18 Chip-Select Pin Functions

Assignment

16-Bit

Chip-Select

Alternate

Function

Discrete

Output

CSPAR0

CSBOOT

—

CS0

—

CS1

—

CS2

BGACK

—

CS3

FC0

PC0

CS4

FC1

PC1

CS5

FC2

PC2

CSPAR1

CS6

ADDR19

PC3

CS7

ADDR20

PC4

CS8

ADDR21

PC5

CS9

ADDR22

PC6

CS10

ADDR23

ECLK

Table 19 Pin Assignment Encodings

Bit Field

Description

Discrete output

Alternate function

Chip-select (8-bit port)

Chip-select (16-bit port)

CSPAR0 — Chip-Select Pin Assignment Register 0

$YFFA44

CS5PA[1:0]

CS4PA[1:0]

CS3PA[1:0]

CS2PA[1:0]

CS1PA[1:0]

CS0PA[1:0]

CSBTPA[1:0]

RESET:

DATA2

DATA1

DATA0

Freescale Semiconductor, Inc.

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