hb28d032bp2 Renesas Electronics Corporation., hb28d032bp2 Datasheet - Page 48

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

HB28E016/D032BP2
Command Response Timings
All timing diagrams use the following schematics and abbreviations:
S: Start bit (= 0)
T: Transmitter bit (Host = 1, Card = 0)
P: One-cycle pull-up (= 1)
E: End bit (= 1)
Z: high impedance state (-> = 1)
D: Data bits
*: repeater
CRC: Cyclic redundancy check bits (7 bits for command or response, 16 bits for block data)
The difference between the P-bit and Z-bit is that a P-bit is actively driven to HIGH by the card
respectively host output driver, while the Z-bit is driven to (respectively kept) HIGH by the pull-up
resistors R
timing of these Hitachi Mobile Embedded Flashes, the following values are defined:
Timing Values
Symbol
N
N
N
N
N
N
N
Notes: 1. Refer to Chapter “Electrical Characteristics” for more details about the access time.
48
CR
ID
AC
RC
CC
WR
ST
2. Refer to Chapter “Time-out Condition”.
CMD
respectively R
Value [clock cycles]
Min
2
5
2*
8
8
2
2
1
DAT
. Actively driven P-bits are less sensitive to noise superposition. For the
Max
64
5
TAAC + NSAC*
—
—
—
2
2
Description
Number of cycles between command and
response
Number of cycles between card identification
or card operation conditions command and the
corresponding response
Number of cycles between a command and
the start of a related data block
Number of cycles between the last response
and a new command
Number of cycles between two commands, if
no response will be sent after the first
command (e.g. broadcast)
Number of cycles between a write command
and the start of a related data block
Number of cycles between stop command and
valid read / write data end