M93C86, M93C76, M93C66, M93C56, M93C46
Connecting to the serial bus
2
Connecting to the serial bus
Figure 3.
Bus master and memory devices on the serial bus
V
V
SS
CC
SDO
SDI
SCK
Bus master
V
V
V
CC
C
Q
D
C
Q
D
C Q D
CC
CC
V
V
V
SS
SS
SS
M93xxx
memory device
M93xxx
memory device
M93xxx
memory device
R
R
R
CS3 CS2 CS1
S
S
S
ORG
ORG
ORG
AI14377
Figure 3 shows an example of three memory devices connected to an MCU, on a serial bus.
Only one device is selected at a time, so only one device drives the Serial Data Output (Q)
line at a time, the other devices are high impedance.
The pull-down resistor R (represented in Figure 3) ensures that no device is selected if the
Bus Master leaves the S line in the high impedance state.
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