Motorola CME-12D60 manual Config Switch, OPERATION when in ON position, I/O Port Used, Mode Chart

CONFIG SWITCH

The CME-12D60 board is shipped from the manufacturer with the following default CONFIG SWITCH settings:

1	2	3	4	5	6	7	8
ON	ON	ON	ON	OFF	ON	OFF	OFF

The 8 position CONFIG SWITCH provides an easy method of configuring the CME-12D60 board operation. Following are the configuration switch descriptions and HC12 I/O port usage:

CONFIG	OPERATION when in ON position	I/O PORT USED
SWITCH
1	MODE A selection (see Mode chart below)	MODA / PE5
2	MODE B selection (see Mode chart below)	MODB / PE6
3	EXT – External Memory enable (1)	PORT A, B, Ext. Bus
4	MON – Monitor Memory enable (2)	N/A
5	VPP - Flash VPP voltage enable	N/A
6	RXD0 – COM1 Serial Port RXD0 input enable	PS0 / RXD0
7	RXD1 – COM2 Serial Port RXD1 input enable	PS3 / RXD1
8	CAN Port RX enable	PCAN0

(1)Enables memory bus operation for access to board memory. Expanded bus must be on for proper operation.

(2)Enables monitor EPROM’s in memory map at 0xC000 – FFFF hex if CONFIG SWITCH position 3 is also on. When in off position memory space is SRAM for BDM use.

MODE CHART

Single Chip Mode	MOD A and B = OFF	Boot from Internal Flash
Expanded Wide Mode	MOD A and B = ON	Boot from External Memory

NOTE: Expanded Narrow Mode is not available on this board.

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