hb28d032bp2 Renesas Electronics Corporation., hb28d032bp2 Datasheet - Page 84

• Manufacturer Part Number: hb28d032bp2
• Description: Mobile Embedded Flash With Multimediacard-tm Interface 16 Mbyte/32 Mbyte
• Manufacturer: Renesas Electronics Corporation.

HB28E016/D032BP2
The access time (t
The synchronous part of the access time is sum of the command frame length and some additional internal
cycles (N
time is T
600 s maximum. The resulting memory access time t
84
T
which are required to access a byte of the memory field.
T
SAD
AAD
CMD
DAT
: The synchronous access time. This time defines the time of the maximum number of cycles
: The asynchronous access time to read a byte out of the memory field.
t
SAD
SAD
AT
Output
= T
Clock
= 0.8 s. The asynchronous access delay of these Hitachi Mobile Embedded Flashes is T
Input
= 16 cycles). At 20 MHz one cycle is 50 ns (1/f
AAD
command frame
AT
+ T
) is divided into two parts:
SAD
: Invalid
Valid data
with
Timing Diagram of Data Input and Output
t
t
OH
IH
t
WH
T
SAD
T
SAD
= N
Access Time
SAD
/f
t
AT
t
pp
PP
AT
t
is the sum of both parts:
T
HL
AAD
PP
t
WL
), multiplied with N
t
ISU
t
OSU
response frame
Valid data
Valid data
t
LH
data
SAD
the resulting frame
V
V
V
V
V
V
IH
IL
IH
IL
OH
OL
AAD
=