Cypress CY7C1541V18, CY7C1543V18 TAP Controller Block Diagram, TAP Electrical Characteristics

CY7C1541V18, CY7C1556V18 CY7C1543V18, CY7C1545V18

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 [13, 14, 15]

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

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

14.Overshoot: VIH(AC) < VDDQ + 0.35V (Pulse width less than tCYC/2), Undershoot: VIL(AC) > −0.3V (Pulse width less than tCYC/2).

15.All Voltage referenced to Ground.

Document Number: 001-05389 Rev. *F Page 15 of 28

[+] Feedback