Hardware Description and Board Operation
3-18
M68VZ328ADS USER’S MANUAL
MOTOROLA
3.2 CONTROL SWITCHES
There are two push buttons on the ADS which function as follows:
1. Reset Switch (SW2): When pressed, a hardware reset is generated to the
MC68VZ328 processor and resumes operation.
2. Abort Switch (SW1): This switch is used to generate a level 7 interrupt to the
MC68VZ328 processor for aborting normal software execution and returning control
to the debug monitor.
3.3 DIP SWITCHES
There are two DIP switch packs on the ADS board, S1 and S2. S1 is used to configure the
memory system and operation modes. S2 is used to enable the on-board peripheral such
as buzzer and touch panel controller. Table 3-1 and Table 3-2 show the description of each
switch.
* Used as monitor and debug port selection in provided monitor program
3.4 OPERATION MODES
M68VZ328ADS supports two operation modes of MC68VZ328: Normal Mode and Boot-
strap Mode. Selection of those operation modes is controlled by setting DIP switch S2-8.
Operation mode has to be selected before resetting the system. Mode is not allowed to be
changed during normal runing. Table 3-3 shows the operation mode configuration.
Normal mode - After power up or system reset in this mode, CSA0 is default to cover the
whole memory map except MC68VZ328 internal registers and EMU space. Also, as reset
Table 3-1. DIP Switch pack S1 Setting
Switch
FUNCTION
ON
OFF
S1-1
UART1 Transceiver
Enable
Disable
S1-2
UART2 Transceiver
Enable
Disable
S1-3
IRDA Module
Enable
Disable
S1-4
Buzzer
Enable
Disable
S1-5
Chip Select of Pen Input
Enable
Disable
S1-6
Pen IRQ
Enable
Disable
S1-7
Unused
S1-8
Unused
Table 3-2. DIP Switch pack S2 Setting
Switch
FUNCTION
ON
OFF
S2-1
CSA0 - FLASH0
Connected
Disconnected
S2-2
CSA0 - FLASH1
Connected
Disconnected
S2-3
CSA1 - FLASH1
Connected
Disconnected
S2-4
CSD0 - SDRAM0
Connected
Disconnected
S2-5
CSD1 - SDRAM1
Connected
Disconnected
S2-6
PD2
Low (UART2*)
High (UART1*)
S2-7
PD3
Low (SDS monitor*)
High (Metrowerks monitor*)
S2-8
Bootstrap Mode
Enable
Disable
Freescale Semiconductor, I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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