S3A7 datasheet(91/133 Pages) RENESAS

91 / 133 page

R01DS0263EU0100 Rev.1.00

Page 91 of 130

Feb 23, 2016

S3A7

2. Electrical Characteristics

2.3.15

CLKOUT Timing

Note 1.

When the EXTAL external clock input or an oscillator is used with division by 1 (the CKOCR.CKOSEL[2:0] bits are 011b and

the CKOCR.CKODIV[2:0] bits are 000b) to output from CLKOUT, the above should be satisfied with an input duty cycle of 45 to

55%.

Note 2.

When the MOCO is selected as the clock output source (the CKOCR.CKOSEL[2:0] bits are 001b), set the clock output division

ratio selection to be divided by 2 (the CKOCR.CKODIV[2:0] bits are 001b).

Figure 2.72

CLKOUT output timing

Table 2.45

CLKOUT timing

Item

Symbol

Min

Max

Unit*1

Test conditions

CLKOUT

CLKOUT pin output cycle*1

VCC = 2.7 V or above

tCcyc

62.5

Figure 2.72

VCC = 1.8 V or above

125

VCC = 1.6 V or above

250

CLKOUT pin high pulse width*2

VCC = 2.7 V or above

tCH

VCC = 1.8 V or above

VCC = 1.6 V or above

150

CLKOUT pin low pulse width*2

VCC = 2.7 V or above

tCL

VCC = 1.8 V or above

VCC = 1.6 V or above

150

CLKOUT pin output rise time

VCC = 2.7 V or above

tCr

-12

VCC = 1.8 V or above

VCC = 1.6 V or above

CLKOUT pin output fall time

VCC = 2.7 V or above

tCf

-12

VCC = 1.8 V or above

VCC = 1.6 V or above

tCf

tCH

tCcyc

tCr

tCL

CLKOUT pin output

Test conditions: VOH = VCC × 0.7, VOL = VCC × 0.3, IOH = -1.0 mA, IOL = 1.0 mA, C = 30 pF

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