MB9BF412R datasheet(80/121 Pages) SPANSION

80 / 121 page

D a t a S h e e t

March 11, 2015, MB9B410R-DS706-00026-3v0-E

CONFIDENTIAL

(7) External Bus Timing

・ External bus clock output characteristics

(VCC = 2.7V to 5.5V, VSS = 0V, TA = - 40°C to + 85°C)

Parameter

Symbol

Pin name

Conditions

Value

Unit

Min

Max

Output frequency

tCYCLE

MCLKOUT*

VCC ≥ 4.5 V

50*

MHz

VCC < 4.5 V

32*

MHz

*1: External bus clock (MCLKOUT) is divided clock of HCLK.

For more information about setting of clock divider, see "CHPATER 12: External Bus Interface" in "FM3

Family PERIPHERAL MANUAL".

When external bus clock is not output, this characteristic does not give any effect on external bus operation.

*2: When AHB bus clock frequency is more than 100MHz, the divider setting for MCLKOUT must be more

than 4.

*3: When AHB bus clock frequency is more than 64MHz, the divider setting for MCLKOUT must be more

than 4.

・ External bus signal input/output Characteristics

(VCC = 2.7V to 5.5V, VSS = 0V, TA = - 40°C to + 85°C)

Parameter

Symbol

Conditions

Value

Unit

Remarks

Signal input characteristics

VIH

0.8 × VCC

VIL

0.2 × VCC

Signal output characteristics

VOH

0.8 × VCC

VOL

0.2 × VCC

VIH

VIL

VIH

VOH

VOL

VOH

Input signal

Output signal

MCLKOUT

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