HYS64V64220GU Datasheet, PDF (9/15 Pages) Infineon Technologies AG – 3.3 V 64M x 64/72-Bit, 512MByte SDRAM Modules 168-pin Unbuffered DIMM Modules

HYS 64/72V64220GU
SDRAM-Modules
11.Self-Refresh Exit is a synchronous operation and begins on the second positive clock edge after
CKE returns high. Self-Refresh Exit is not complete until a time period equal to t_RC is satisfied
after the Self Refresh Exit command is registered.
12.This is referenced to the time at which the output achieves the open circuit condition, not to
output voltage levels.
CLOCK 1.4 V
t IS
tIH
t CH
2.4 V
0.4 V
tCL
tT
INPUT
OUTPUT
1.4 V
tAC
tLZ
tAC
tOH
tHZ
1.4 V
IO.vsd
I/O
50 pF
Measurement conditions for
t_AC and t_OH
Serial Presence Detect
A serial presence detect storage device - E²PROM - is assembled onto the module. Information
about the module configuration, speed, etc. is written into the E²PROM device during module
production using a serial presence detect protocol (I²C synchronous 2-wire bus).
INFINEON Technologies
9
9.01