Panasonic MN103001G/F01K - Manual (Page 312)

Serial Interface
13-10
13.2.4 Description of Operation
<Clock synchronous mode>
■ Clock synchronous mode connection
Two different connection methods are possible, one for unidirectional transfer, and the other for bi-directional
transfer.
When SBT pin is an output only during transmission (SC0TOE = "0"), it is necessary to pull up SBT pin. In
addition, when using SBO pin as a data input/output (SC0MD1 and 0 = "11"), it is necessary to pull up SBO pin.
Connect a pull-up resistor externally.
When using SBO pin as a data output and SBI pin as a data input (SC0MD1 and 0 = "01"), the SBO pin is always
an output and the SBI pin is always an input.
When using SBO pin as a data input/output (SC0MD1 and 0 = "11"), the SBO pin is an output only during
transmission, and is normally an input.
When SC0TOE is "0", the SBT pin is an output only during transmission with the internal clock, and is normally an
input. Furthermore, when SC0TOE is "1", the SBT pin is always an output when the internal clock is selected.
Fig. 13-2-2 Connections
SBO
SBI
SBT
Transmission
SBO
SBI
SBT
Reception
SBO
SBI
SBT
Transmission/
reception
SBO
SBI
SBT
Transmission/
reception
Unidirectional transfer Bi-directional transfer (SC0MD1 and 0 = “01”)
SBO
SBI
SBO
SBI
Bi-directional transfer (SC0MD1 and 0 = “11”)
SBT SBT
Transmission/
reception
Transmission/
reception