Cypress CY7C1305BV25 TAP Controller Block Diagram, Parameter Description Min Max Unit, Hold Times

CY7C1305BV25

CY7C1307BV25

TAP Controller Block Diagram

TDI

						0
				Bypass Register
Selection				2	1	0	Selection	TDO
Circuitry	Instruction Register						Circuitry
31	30 29 .		.	2	1	0
	Identification Register
106	. .	.	.	2	1	0
	Boundary Scan Register

TCK TMS

TAP Controller

TAP Electrical Characteristics Over the Operating Range[12, 15, 17]

Parameter	Description	Test Conditions	Min.	Max.	Unit
VOH1	Output HIGH Voltage	IOH = −2.0 mA	1.7		V
VOH2	Output HIGH Voltage	IOH = −100 ∝A	2.1		V
VOL1	Output LOW Voltage	IOL = 2.0 mA		0.7	V
VOL2	Output LOW Voltage	IOL = 100 ∝A		0.2	V
VIH	Input HIGH Voltage		1.7	VDD + 0.3	V
VIL	Input LOW Voltage		–0.3	0.7	V
IX	Input and Output Load Current	GND ≤ VI ≤ VDDQ	−5	5	∝A
TAP AC Switching Characteristics Over the Operating Range [13, 14]

Parameter	Description	Min.	Max.	Unit
tTCYC	TCK Clock Cycle Time	50		ns
tTF	TCK Clock Frequency		20	MHz
tTH	TCK Clock HIGH	20		ns
tTL	TCK Clock LOW	20		ns
Set-up Times
tTMSS	TMS Set-up to TCK Clock Rise	10		ns
tTDIS	TDI Set-up to TCK Clock Rise	10		ns
tCS	Capture Set-up to TCK Rise	10		ns
Hold Times
tTMSH	TMS Hold after TCK Clock Rise	10		ns
tTDIH	TDI Hold after Clock Rise	10		ns
tCH	Capture Hold after Clock Rise	10		ns

Notes:

12.These characteristic pertain to the TAP inputs (TMS, TCK, TDI and TDO). Parallel load levels are specified in the Electrical Characteristics Table.

13.Parameters tCS and tCH refer to the set-up and hold time requirements of latching data from the boundary scan register.

14.Test conditions are specified using the load in TAP AC test conditions. tR/tF = 1 ns.

Document #: 38-05630 Rev. *A Page 12 of 21

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