Cypress CY8C20x46, CY8C20396 manual AC External Clock Specifications, AC Programming Specifications

CY8C20x36/46/66, CY8C20396

AC External Clock Specifications

The following table lists guaranteed maximum and minimum specifications for the entire voltage and temperature ranges.

Table 29. AC External Clock Specifications

Symbol	Description	Conditions	Min	Typ	Max	Units
FOSCEXT	Frequency		0.750	–	25.2	MHz
–	High Period		20.6	–	5300	ns
–	Low Period		20.6	–	–	ns
–	Power Up IMO to Switch		150	–	–	μs

AC Programming Specifications

Figure 12. AC Waveform

SCLK (P1[1])

TRSCLK

SDATA (P1[0])

	TFSCLK
TSSCLK	THSCLK

TDSCLK

The following table lists the guaranteed maximum and minimum specifications for the entire voltage and temperature ranges.

Table 30. AC Programming Specifications

Symbol	Description		Conditions	Min	Typ	Max	Units
TRSCLK	Rise Time of SCLK			1	–	20	ns
TFSCLK	Fall Time of SCLK			1	–	20	ns
TSSCLK	Data Set up Time to Falling Edge of SCLK			40	–	–	ns
THSCLK	Data Hold Time from Falling Edge of SCLK			40	–	–	ns
FSCLK	Frequency of SCLK			0	–	8	MHz
TERASEB	Flash Erase Time (Block)			–	–	18	ms
TWRITE	Flash Block Write Time			–	–	25	ms
TDSCLK	Data Out Delay from Falling Edge of SCLK	3.6 < Vdd		–	–	60	ns
TDSCLK3	Data Out Delay from Falling Edge of SCLK	3.0 ≤ Vdd ≤ 3.6		–	–	85	ns
TDSCLK2	Data Out Delay from Falling Edge of SCLK	1.71 ≤ Vdd ≤ 3.0		–	–	130	ns

Document Number: 001-12696 Rev. *D Page 24 of 34

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