Setting M68Em05P18 Jumper Headers And Switches - Motorola M68EM05P18 User Manual

Setting M68EM05P18 Jumper Headers and Switches

M68EM05P18UM/D
MOTOROLA
Your M68EM05P18 has two jumper headers — W1 and W2 — and an
8-position DIP switch, SW1, for the port A pullup/interrupt mask options.
Table 3 provides a quick reference for configuration options. Refer to the
paragraphs that follow for a more detailed explanation.
Table 3. Jumper Header and Switch Positions for MMDS/MMEVS
Jumper/
Position
Switch
CAN
COMMON
MMDS05
Clock
Source
CAN
COMMON
Select,
MMDS05
W1
CAN
COMMON
MMDS05
Reset
Select,
W2
PA0
Port A
Interrupt
ON
PORT A MASK
Mask
OPTION PULLUPS
Option
Control,
SW1
ON
PORT A MASK
OPTION PULLUPS
MMDS/MMEVS Configuration and Operation
MMDS/MMEVS Configuration and Operation

Setting M68EM05P18 Jumper Headers and Switches

Select the 4-MHz canned
oscillator located on the EM
T_OSC1
Select the clock originating from
the development system platform
board. The frequency is
T_OSC1
controlled by the OSC command
and is 2 MHz on power up.
Selects a user supplied clock
source. The clock is input to
connector J2 through a target
T_OSC1
Always in this position for MMDS
or MMEVS operation. Enables
EVS
software to control bidirectional
TARGET
Not applicable on MMDS or
EVS
TARGET
Each port A bit is individually
configurable. In the left position,
the option is not selected.
PA7
PA0
In the right position, the option is
EVS
PA7
TARGET
Description
board at XY1.
cable assembly.
reset.
MMEVS
selected.
Factory
Setting
X
X
X
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