W97AH6KB datasheet(112/127 Pages) WINBOND

112 / 127 page

W97AH6KB / W97AH2KB

Publication Release Date: May 15, 2014

Revision: A01-001

- 112 -

VTT + 2x Y mV

VTT + Y mV

VTT - Y mV

VTT - 2x Y mV

VTT

Actual waveform

tLZ(DQS), tLZ(DQ)

tHZ(DQS), tHZ(DQ)

VOH - X mV

VOH - 2x X mV

VOL + 2x X mV

VOL + X mV

VTT

VOH

VOL

2x Y

2x X

T1T2

T1 T2

Stop driving point = 2 x T1

– T2

begin driving point = 2 x T1

– T2

Figure of HSUL_12 Driver Output Reference Load for Timing and Slew Rate

The parameters tLZ(DQS), tLZ(DQ), tHZ(DQS), and tHZ(DQ) are defined as single-ended. The timing parameters tRPRE

and tRPST are determined from the differential signal DQS_t-DQS_c.

13. Measured from the start driving of DQS_t - DQS_c to the start driving the first rising strobe edge.

14. Measured from the from start driving the last falling strobe edge to the stop driving DQS_t , DQS_c.

15. tDQSCKDS is the absolute value of the difference between any two tDQSCK measurements (within a byte lane) within a contiguous sequence

of bursts within a 160nS rolling window. tDQSCKDS is not tested and is guaranteed by design. Temperature drift in the system is < 10°C/s.

Values do not include clock jitter.

16. tDQSCKDM is the absolute value of the difference between any two tDQSCK measurements (within a byte lane) within a 1.6µS rolling window.

tDQSCKDM is not tested and is guaranteed by design. Temperature drift in the system is < 10°C/s. Values do not include clock jitter.

17. tDQSCKDL is the absolute value of the difference between any two tDQSCK measurements (within a byte lane) within a 32mS rolling window.

tDQSCKDL is not tested and is guaranteed by design. Temperature drift in the system is < 10°C/s. Values do not include clock jitter.

W97AH6KB Datasheet(PDF) 112 Page - Winbond