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MODE SWITCH
The 3 to 5 position MODE SWITCH on the PM12xxx Module provides an easy method of
configuring the HC12 operating Mode and Options from RESET.
NOTE:
Expanded Narrow Mode is not available on this board, Expanded Wide
operation is required due to the memory application and that any expanded bus
operation requires both HC12 I/O ports A and B in any case.
Following are the Mode Switch selections and descriptions:
PM12D60
Default: 1 and 2 ON, 3 - 5 OFF.
MODE
SWITCH
1 and 2
3
4
5
PM12DG128 / PM12DT128
Default: 1 and 2 ON, 3 OFF
MODE
SWITCH
1 and 2
3
PM12DP256
Default: 1 - 3 ON, 4 and 5 OFF
MODE
SWITCH
1 and 2
3
4
5
SELECTION
OPTION
Operating Mode
Port H pull device
Port G pull device
Oscillator Select
SELECTION
OPTION
Operating Mode
Oscillator Select
SELECTION
OPTION
Operating Mode
MODC Selection
ROMON Select
Oscillator Select
OFF POSITION
Single Chip Mode
Port H Pull-Down
Port G Pull-Down
Ext. 16Mhz Clock
OFF POSITION
Single Chip Mode
Ext. 16Mhz Clock
OFF POSITION
Single Chip Mode
Normal Modes
Internal Flash ON
Ext. 16Mhz Clock
14
ON POSITION
Expanded Wide Mode
Port H Pull-Up
Port G Pull-Up
User applied crystal
ON POSITION
Expanded Wide Mode
User applied crystal
ON POSITION
Expanded Wide Mode
Special / Emulation Mode
Internal Flash OFF
User applied crystal
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