ISD94100 Series Technical Reference Manual
Sep 9, 2019
Page
731
of 928
Rev1.09
IS
D
9
410
0
S
ER
IE
S
T
E
C
HN
ICA
L
RE
F
E
RE
NCE
M
AN
U
AL
SPI FIFO Control Register (SPIn_FIFOCTL)
Register
Offset
R/W Description
Reset Value
SPI1_FIFOCTL
0x10
R/W SPI1 FIFO Control Register
0x2200_0000
SPI2_FIFOCTL
0x10
R/W SPI2 FIFO Control Register
0x2200_0000
31
30
29
28
27
26
25
24
Reserved
TXTH
Reserved
RXTH
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
Reserved
TXFBCLR
RXFBCLR
7
6
5
4
3
2
1
0
TXUFIEN
TXUFPOL
RXOVIEN
RXTOIEN
TXTHIEN
RXTHIEN
TXRST
RXRST
Bits
Description
[31]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write
with reset value.
[30:28]
TXTH
Transmit FIFO Threshold
If the valid data count of the transmit FIFO buffer is less than or equal to the TXTH
setting, the TXTHIF bit will be set to 1, else the TXTHIF bit will be cleared to 0. For
SPI1~SPI2, the MSB of this bit field is only meaningful while SPI mode 8~16 bits of
data length.
[27]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write
with reset value.
[26:24]
RXTH
Receive FIFO Threshold
If the valid data count of the receive FIFO buffer is larger than the RXTH setting, the
RXTHIF bit will be set to 1, else the RXTHIF bit will be cleared to 0. For SPI1~SPI2,
the MSB of this bit field is only meaningful while SPI mode 8~16 bits of data length.
[23:10]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write
with reset value.
[9]
TXFBCLR
Transmit FIFO Buffer Clear
0 = No effect.
1 = Clear transmit FIFO pointer. The TXFULL bit will be cleared to 0 and the TXEMPTY
bit will be set to 1. This bit will be cleared to 0 by hardware about 1 system clock after
it is set to 1.
Note:
The TX shift register will not be cleared.
[8]
RXFBCLR
Receive FIFO Buffer Clear
0 = No effect.
1 = Clear receive FIFO pointer. The RXFULL bit will be cleared to 0 and the RXEMPTY
bit will be set to 1. This bit will be cleared to 0 by hardware about 1 system clock after
it is set to 1.
Note:
The RX shift register will not be cleared.
Содержание ISD94100 Series
Страница 528: ...ISD94100 Series Technical Reference Manual Sep 9 2019 Page 528 of 928 Rev1 09 ISD94100 SERIES TECHNICAL REFERENCE MANUAL...
Страница 626: ...ISD94100 Series Technical Reference Manual Sep 9 2019 Page 626 of 928 Rev1 09 ISD94100 SERIES TECHNICAL REFERENCE MANUAL...
Страница 702: ...ISD94100 Series Technical Reference Manual Sep 9 2019 Page 702 of 928 Rev1 09 ISD94100 SERIES TECHNICAL REFERENCE MANUAL...
Страница 875: ...ISD94100 Series Technical Reference Manual Sep 9 2019 Page 875 of 928 Rev1 09 ISD94100 SERIES TECHNICAL REFERENCE MANUAL...