Transcend TS4GHR72V1C Ficha Técnica descarregar pdf (Página 12)

WRITE recovery time

tWR

15

-

ns

Mode Register Set command cycle time

tMRD

8

-

nCK

Speed

DDR4 2133

Unit

Parameter

Symbol

Min

Max

CAS_n to CAS_n command delay for same

bank group

tCCD_L

6

-

nCK

CAS_n to CAS_n command delay for

different bank group

tCCD_S

4

-

nCK

Auto precharge write recovery + precharge

time

tDAL

tWR+tRP/tCK

nCK

ACTIVATE to ACTIVATE Command delay to

different bank group for 2KB page size

tRRD_S(2K)

Max(4nCK,5.3ns)

-

nCK

ACTIVATE to ACTIVATE Command delay to

different bank group for 1KB page size

tRRD_S(1K)

Max(4nCK,3.7ns)

-

nCK

ACTIVATE to ACTIVATE Command delay to

different bank group for 1/ 2KB page size

tRRD_S

(1/ 2K)

Max(4nCK,3.7ns)

-

nCK

ACTIVATE to ACTIVATE Command delay to

same bank group for 2KB page size

tRRD_L(2K)

Max(4nCK,6.4ns)

-

nCK

ACTIVATE to ACTIVATE Command delay to

same bank group for 1KB page size

tRRD_L(1K)

Max(4nCK,5.3ns)

-

nCK

ACTIVATE to ACTIVATE Command delay to

same bank group for 1/2KB page size

tRRD_L

(1/ 2K)

Max(4nCK,5.3ns)

-

nCK

Four activate window for 2KB page size

tFAW_2K

Max(28nCK, 30ns)

-

ns

Four activate window for 1KB page size

tFAW_1K

Max(20nCK, 21ns)

-

ns

Four activate window for 1/2KB page size

tFAW_1/2K

Max(16nCK, 15ns)

-

ns

Power-up and RESET calibration time

tZQinit

1024

-

nCK

Normal operation Full calibration time

tZQoper

512

-

nCK

Normal operation short calibration time

tZQCS

128

-

nCK

Exit Self Refresh to commands not re-quiring

a locked DLL

tXS

tRFC(min)+ 10ns

-

Exit Self Refresh to commands requir-ing a

locked DLL

tXSDLL

tDLLK(min)

-

Internal READ Command to PRE-CHARGE

Command delay

tRTP

Max(4nCK,7.5ns)

-

Minimum CKE low width for Self re-fresh

entry to exit timing

tCKESR

tCKE(min)+1nCK

-

Exit Power Down with DLL on to any valid

command;Exit Precharge Power Down with

DLL frozen to commands not requiring a

locked DLL

tXP

Max (4nCK,6ns)

-

CKE minimum pulse width

tCKE

Max (3nCK,5ns)

-

Asynchronous RTT turn-on delay

(Power-Down with DLL frozen)

tAONAS

1.0

9.0

ns

Asynchronous RTT turn-off delay

(Power-Down with DLL frozen)

tAOFAS

1.0

9.0

ns

RTT dynamic change skew

tADC

0.3

0.7

tCK

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 27 28

DD relative to Vss 22
DDQ pin relative to Vss 22

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