Preliminary
Registers
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7.3.16 System Status Register (I2C_SYSS)
Figure 7-29. System Status Register (I2C_SYSS)
31
1
0
Reserved
RDONE
R-0
R/W-1
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 7-19. System Status Register (I2C_SYSS) Field Descriptions
Bit
Field
Value
Description
31-1
Reserved
0
Reserved
0
RDONE
Reset done bit. This read-only bit indicates the state of the reset in case of hardware reset, global
software reset (I2C_SYSC.SRST) or partial software reset (I2C_CON.I2C_EN).
The module must receive all its clocks before it can grant a reset-completed status.
0
Internal module reset in ongoing
1
Reset completed
Value after reset is low.
7.3.17 Buffer Configuration Register (I2C_BUF)
This read/write register enables DMA transfers and allows the configuration of FIFO thresholds for the
FIFO management (see the FIFO Management subsection).
Figure 7-30. Buffer Configuration Register (I2C_BUF)
31
16
Reserved
R-0
15
14
13
8
7
6
5
0
RDMA_EN
RXFIFO_CLR
RXTRSH
XDMA_EN
TXFIFO_CLR
TXTRSH
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 7-20. Buffer Configuration Register (I2C_BUF) Field Descriptions
Bit
Field
Value
Description
31-16
Reserved
0
Reserved
15
RDMA_EN
Receive DMA channel enable. When this bit is set to 1, the receive DMA channel is enabled and
the receive data ready status bit (I2C_IRQSTATUS_RAW: RRDY) is forced to 0 by the core.
0
Receive DMA channel disabled
1
Receive DMA channel enabled
Value after reset is low.
14
RXFIFO_CLR
Receive FIFO clear. When set, receive FIFO is cleared (hardware reset for RX FIFO generated).
This bit is automatically reset by the hardware. During reads, it always returns 0.
0
Normal mode
1
Rx FIFO is reset
Value after reset is low.
882
Inter-Integrated Circuit (I2C) Controller Module
SPRUGX9 – 15 April 2011
© 2011, Texas Instruments Incorporated
Содержание TMS320C6A816 Series
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