Motorola MCF5282, MCF5281 user manual External Interface Timing Characteristics

External Interface Timing Characteristics

Table 33-9. SGFM Flash Module Life Characteristics

(VDDF = 2.7 to 3.6 V)

Parameter	Symbol	Value	Unit
Maximum number of guaranteed program/erase cycles1 before failure	P/E	10,0002	Cycles
Data retention at average operating temperature of 85°C	Retention	10	Years

1A program/erase cycle is defined as switching the bits from 1 → 0 → 1.

2Reprogramming of a Flash array block prior to erase is not required.

33.7External Interface Timing Characteristics

Table 33-10lists processor bus input timings.

NOTE:

All processor bus timings are synchronous; that is, input setup/hold and output delay with respect to the rising edge of a reference clock. The reference clock is the CLKOUT output.

All other timing relationships can be derived from these values.

Table 33-10. Processor Bus Input Timing Specifications

Name			Characteristic1			Symbol	Min	Max	Unit
B0	CLKOUT					tCYC	12.5	—	ns
			Control Inputs
B1a	Control input valid to CLKOUT high2					tCVCH	10	—	ns
B1b			valid to CLKOUT high3			tBKVCH	10	—	ns
		BKPT
B2a		CLKOUT high to control inputs invalid2				tCHCII	0	—	ns
B2b		CLKOUT high to asynchronous control input			invalid3	tBKNCH	0	—	ns
				BKPT
			Data Inputs
B4		Data input (D[31:0]) valid to CLKOUT high				tDIVCH	6	—	ns
B5		CLKOUT high to data input (D[31:0]) invalid				tCHDII	0	—	ns

1Timing specifications have been indicated taking into account the full drive strength for the pads.

2TEA and TA pins are being referred to as control inputs.

3Refer to figure A-19.

33-10 MCF5282 User’s Manual MOTOROLA