Cypress CY7C1557V18 TAP Controller Block Diagram, TAP Electrical Characteristics, Tdi, Tck, Tms

CY7C1546V18, CY7C1557V18 CY7C1548V18, CY7C1550V18

TAP Controller Block Diagram

										0
								Bypass Register
TDI		Selection						2	1	0	Selection
				Instruction Register
		Circuitry
											Circuitry
			31	30	29	.	.	2	1	0
				Identification Register
			108	.	.	.	.	2	1	0
				Boundary Scan Register
	TCK
					TAP Controller
	TMS

TDO

TAP Electrical Characteristics

Over the Operating Range [11, 12, 13]

Parameter	Description	Test Conditions	Min	Max	Unit
VOH1	Output HIGH Voltage	IOH = −2.0 mA	1.4		V
VOH2	Output HIGH Voltage	IOH = −100 μA	1.6		V
VOL1	Output LOW Voltage	IOL = 2.0 mA		0.4	V
VOL2	Output LOW Voltage	IOL = 100 μA		0.2	V
VIH	Input HIGH Voltage		0.65VDD	VDD + 0.3	V
VIL	Input LOW Voltage		–0.3	0.35VDD	V
IX	Input and Output Load Current	GND ≤ VI ≤ VDD	–5	5	μA

Notes

11.These characteristics apply to the TAP inputs (TMS, TCK, TDI and TDO). Parallel load levels are specified in Electrical Characteristics on page 20.

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

13.All voltage refers to ground.

Document Number: 001-06550 Rev. *E Page 15 of 28

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