Spi control register – Rainbow Electronics AT75C310 User Manual
Page 108
AT75C310
108
SPI Control Register
Register Name:
SP_CR
Access Type:
Write-only
•
SPIEN: SPI Enable
0 = No effect.
1 = Enables the SPI to transfer and receive data.
•
SPIDIS: SPI Disable
0 = No effect.
1 = Disables the SPI.
All pins are set in input mode and no data is received or transmitted.
If a transfer is in progress, the transfer is finished before the SPI is disabled.
If both SPIEN and SPIDIS are equal to one when the control register is written, the SPI is disabled.
•
SWRST: SPI Software reset
0 = No effect.
1 = Resets the SPI.
A software-triggered hardware reset of the SPI interface is performed.
0x1C
Interrupt Mask Register
SP_IMR
Read-only
0
0x20
Reserved
–
–
–
0x24
Reserved
–
–
–
0x28
Reserved
–
–
–
0x2C
Reserved
–
–
–
0x30
Chip Select Register 0
SP_CSR0
Read/write
0
0x34
Chip Select Register 1
SP_CSR1
Read/write
0
0x38
Reserved
–
–
–
0x3C
Reserved
–
–
–
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
–
–
–
–
15
14
13
12
11
10
9
8
–
–
–
–
–
–
–
–
7
6
5
4
3
2
1
0
SWRST
–
–
–
–
–
SPIDIS
SPIEN
Table 21. SPI Memory Map (Continued)
Offset
Register Description
Register Name
Access
Reset State