Cypress Semiconductor EZ-Host CY7C67300 User Manual download pdf (Page 87)

CY7C6730

PRELIMINARY

Document #: 38-08015 Rev. *D Page 87 of 120

Master Active Enable (Bit 7)

The Master Active Enable bit is a read only bit that indicates if the master state machine is active or idle. This field only applies

to master mode.

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 (three-state master SS output, for single SS line in slave mode)

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 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: SS low to SCK active, SCK inactive to SShigh, SS high time. This field only applies to

master mode.

7.12.2 SPI Control Register [0xC0CA] [R/W]

Figure 7-73. SPI Control Register

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

Bit # 15 14 13 12 11 10 9 8

Field SCK

Strobe

FIFO

Init

Byte

Mode

Full Duplex SS

Manual

Read

Enable

Transmit

Ready

Receive

Data

Ready

Read/Write W W W R R R R R/W

Default 0 0 0 0 0 0 0 1

Bit # 7 6 5 4 3 2 1 0

Field Transmit

Empty

Receive

Full

Transmit Bit Length Receive Bit Length

Read/Write R/W R/W R/W R/W R/W R/W R/W R/W

Default 1 0 0 0 0 0 0 0

Table 7-13. Scale Select Field Definition for SCK Frequency (continued)

Scale Select [12:9] SCK Frequency

1 2 ... 82 83 84 85 86 87 88 89 90 91 92 ... 119 120

Comments to this Manuals

No comments

Cypress Semiconductor EZ-Host CY7C67300 User Manual Page 87

Comments to this Manuals

Related products and manuals for Motherboards Cypress Semiconductor EZ-Host CY7C67300