MFC2000 Datasheet, PDF (189/426 Pages) List of Unclassifed Manufacturers – Multifunctional Peripheral Controller 2000

Hardware Description
MFC 2000 Multifunctional Peripheral Controller 2000
7.2 Serial Programming Interface
The serial programming interface is a two-wire bidirectional serial bus, which provides a simple and efficient way
for data exchange between devices.
Main Features:
• Only two bus lines are required; a serial interface data (SID) and a serial interface clock (SIC)
• Master–transmitter & master–receiver
• Schmitt trigger on SID input
• Synchronization capability (allowing slave to add wait state by pulling the clock low)
• Optional interrupt or polling operation
• Optional firmware operation for manual control of the SPI bus
• Soft reset
7.2.1 Function Description
Physical Connection
PM[0]/GPO[0]/SPI_SID/EADC_D[9]/T_EXT_BREQ
MFC2K (Master)
SID in
SID_n out
SIC in
SIC_n out
SID
(serial interface data)
SIC
(serial interface clock)
Slave
SID in
SID_n out
SIC in
SIC_n out
PM[1]/GPO[1]/SPI_SIC/EADC_D[8]/T_EXT_BACK
Figure 7-23. Serial Programming Interface, Physical Connection
Notes:
1. Master is the device that initiates a transaction, generates clock signal, and terminates the
transaction.
2. Data and clock can only be driven low, and cannot be driven high. The pull-up resistors are
responsible to create a logic 1. This configuration forms wire – AND connection.
3. Slave can only drive the clock signal to add wait state.
4. There is no minimum requirement for clock frequency.
100723A
Conexant
7-41