CY7C67200
3Wire Enable (Bit 15)
The 3Wire Enable bit indicates if the MISO and MOSI data lines are tied together allowing only half duplex operation.
1:MISO and MOSI data lines are tied together
0:Normal MISO and MOSI Full Duplex operation (not tied together)
Phase Select (Bit 14)
The Phase Select bit selects advanced or delayed SCK phase. This field only applies to master mode.
1:Advanced SCK phase
0:Delayed SCK phase
SCK Polarity Select (Bit 13)
This SCK Polarity Select bit selects the polarity of SCK.
1:Positive SCK polarity
0:Negative SCK polarity
Scale Select (Bits [12:9])
The Scale Select field provides control over the SCK frequency, based on 48 MHz. See Table 34 for a definition of this field. This field only applies to master mode.
Table 34.Scale Select Field Definition for SCK Frequency
Scale Select [12:9] | SCK Frequency |
0000 | 12 MHz |
0001 | 8 MHz |
0010 | 6 MHz |
0011 | 4 MHz |
0100 | 3 MHz |
0101 | 2 MHz |
0110 | 1.5 MHz |
0111 | 1 MHz |
1000 | 750 KHz |
1001 | 500 KHz |
1010 | 375 KHz |
1011 | 250 KHz |
1100 | 375 KHz |
1101 | 250 KHz |
1110 | 375 KHz |
1111 | 250 KHz |
Master Active Enable (Bit 7)
The Master Active Enable bit is a
1:Master state machine is active
0:Master state machine is idle
Master Enable (Bit 6)
The Master Enable bit sets the SPI interface to master or slave. This bit is only writable when the Master Active Enable bit reads ‘0’, otherwise value will not change.
1:Master SPI interface
0:Slave SPI interface
SS Enable (Bit 5)
The SS Enable bit enables or disables the master SS output.
1:Enable master SS output
0:Disable master SS output
SS Delay Select (Bits [4:0])
When the SS Delay Select field is set to ‘00000’ this indicates manual mode. In manual mode SS is controlled by the SS Manual bit of the SPI Control register. When the SS Delay Select field is set between ‘00001’ to ‘11111’, this value indicates the count in half bit times of auto transfer delay for:
SSLOW to SCK active, SCK inactive to SS HIGH, SS HIGH time. This field only applies to master mode.
Document #: | Page 54 of 78 |
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