hb288064mm1 Renesas Electronics Corporation., hb288064mm1 Datasheet - Page 44

• Manufacturer Part Number: hb288064mm1
• Description: Multimediacard 64 Mbyte
• Manufacturer: Renesas Electronics Corporation.

HB288064MM1
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)
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 the HB288064MM1, the following values are defined:
Timing Values
Symbol
N
N
N
N
N
N
Notes: 1. Refer to Chapter “Electrical Characteristics” for more details about the access time.
44
CR
ID
AC
RC
CC
WR
2. Refer to Chapter “Time-out Condition”.
CMD
respectively R
Value [clock cycles]
Min
2
5
2*
8
8
2
1
DAT
. Actively driven P-bits are less sensitive to noise superposition. For the
Max
64
5
TAAC + NSAC*
—
—
—
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