Cypress CY7C1294DV18, CY7C1292DV18 manual TAP Controller Block Diagram

CY7C1292DV18

CY7C1294DV18

TAP Controller Block Diagram

TDI

TCK

Selection Circuitry

0

Bypass Register

2 1 0 Instruction Register

31 30 29 . . 2 1 0 Identification Register

106 . . . . 2 1 0 Boundary Scan Register

Selection

Circuitry

TDO

TMS

TAP Controller

TAP Electrical Characteristics Over the Operating Range [10, 11, 12]

Parameter	Description	Test Conditions	Min.	Max.	Unit
VOH1	Output HIGH Voltage	IOH = −2.0 mA	1.4		V
VOH2	Output HIGH Voltage	IOH = −100 ∝A	1.6		V
VOL1	Output LOW Voltage	IOL = 2.0 mA		0.4	V
VOL2	Output LOW Voltage	IOL = 100 ∝A		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 OutputLoad Current	GND ≤ VI ≤ VDD	−5	5	∝A

Notes:

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

11.Overshoot: VIH(AC) < VDDQ +0.85V (Pulse width less than tCYC/2), Undershoot: VIL(AC) > –1.5V (Pulse width less than tCYC/2).

12.All voltage referenced to Ground.

Document #: 001-00350 Rev. *A Page 12 of 23

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