START OF NEW COMMAND
tCSL
SS/
tCL
tCH
SCK
RD
6
MDR1
WR
MDR1
DATA
D7 D6 D5 D4 D3 D2 D1 D0
X
2
X
1
X
0
X
X
X
1
X
0
RANDOM DATA
MOSI
BIT #
BIT #
7
6
5
4
3
7
6
5
4
3
2
1
0
7
5
4
3
2
D7 D6 D5 D4 D3 D2 D1 D0
MISO
7
6
5
4
3
2
1
0
TRI-STATE
NOTE: Write to MDR1 followed by Read from MDR1 operation
FIGURE 3. WR MDR1 - RD MDR1
tCSI
SS/
SCK
CLR
6
STR
RD
CNTR
4
X
2
X
1
X
0
RANDOM DATA
X
X
X
MOSI
BIT #
7
6
5
3
7
5
4
3
2
1
0
BYTE 1
BYTE 0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
MISO
BIT #
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
TRI-STATE
NOTE: Read CNTR (in 2-byte configuration) followed by CLR STR operation.
FIGURE 4. RD CNTR - CLR STR
t 1
t 2
f CKi
t 3
f f
(Note 4)
t 3
t 5
(MDR0 <7> = 0)
(Note 4)
f f
(MDR0 <7> = 1)
t 5
A
t 4
t 4
t 4
t 4
tis
B
tih
tis
tih
Note 1
Note 2
INDEX/
tid
Note 1. Synchronous index coincident with both A and B high.
Note 2. Synchronous index coincident with both A and B low..
Note 3. fF is the internal effective filter clock.
FIGURE 5. fCKI, A, B and INDEX
7366R-041906-8
LSI [ LSI COMPUTER SYSTEMS ]
