Motorola CME-12D60 manual Busport, Bdm-In, Bgnd GND, Reset

BUS_PORT

The BUS_PORT supports off-board memory devices as follows:

GND	1	2	D11
D10	3	4	D12
D9	5	6	D13
D8	7	8	D14
A0	9	10	D15
A1	11	12	A2
A10	13	14	A3

/OE 15 16 A4 A11 17 18 A5 A9 19 20 A6 A8 21 22 A7

A12 23 24 A13

/WE 25 26 CS0 CS1 27 28 CS2 CS3 29 30 CS4 CS5 31 32 IRQ

+5V 33 34 /P-SEL /RW 35 36 CS6

E 37 38 CS7 GND 39 40 / RESET

J2

A14	1	2	A15
MODA/PE5	3	4	MODB/PE6
GND	5	6	+5V

D8 - D15 High Byte Data Bus in Wide Expanded Mode and Peripheral 8 bit data bus. Port A in Single Chip Mode.

A0 – A15 Memory Addresses 0 to 15.

/OE Memory Output Enable signal, Active Low. Valid with ECLK and R/W high.

CS0 – CS7 Peripheral chip selects, 16 bytes each located at $200 - $27F hex, 8 bit access (narrow bus).

/WE Memory Write Enable signal, Active Low. Valid with ECLK high and R/W low.

IRQ HC12 IRQ (PE1) Interrupt Input.

/RW HC12 Read/Write (PE2) control signal.

EHC12 ECLK (PE4) bus clock signal. Stretch should be enabled in software.

/P-SELSelects Peripheral area, register following space, 8 bits wide.

/RESET HC12 active low RESET signal.

BDM-IN

The BDM-IN port is a 6 pin header compatible in pinout with the Motorola Background Debug Mode (BDM) Pod. This allows the connection of a background debugger for software development, programming and debugging in real-time, since the BDM control logic does not reside in the CPU.

BGND	1	2	GND	See the HC12 Technical Reference Manual for complete
	3	4	/RESET	documentation of the BDM.
	5	6	+5V

A Background Debug Module is available from the manufacturer.

The BDM-OUTport is provided for future use.

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