SN32F760 Series
32-Bit Cortex-M0 Micro-Controller
SONiX TECHNOLOGY CO., LTD
Page 173
Version 2.0
0
Reserved
R
0
14.11.18
USART n RS485 Control register (USARTn_RS485CTRL) (n=0,1)
Address Offset: 0x3C
Bit
Name
Description
Attribute
Reset
31:6
Reserved
R
0
5
OINV
Polarity control. This bit reverses the polarity of the direction control signal
on the RTS pin.
0: The direction control pin will be driven to logic 0 when the transmitter
has data to be sent. It will be driven to logic 1 after the last bit of data
has been transmitted.
1: The direction control pin will be driven to logic 1 when the transmitter
has data to be sent. It will be driven to logic 0 after the last bit of data
has been transmitted.
R/W
0
4
ADCEN
Auto Direction control enable bit.
0: Disable
1: Enable. RTS pin is used for direction control. HW will switch GPIO to
URTSn) pin automatically.
R/W
0
3
Reserved
R
0
2
AADEN
Auto Address Detect (AAD) enable bit.
0: Disable
1: Enable
R/W
0
1
RXEN
RS-485/EIA-485 Receiver enable bit. (Only work when NMMEN = 1)
0: Disable
1: Enable
R/W
0
0
NMMEN
RS-485/EIA-485 Normal Multidrop Mode (NMM) enable bit.
0: Disable
1: Enable. In this mode, an address is detected when a received byte
causes the USART to set the parity error and generate an interrupt.
R/W
0
14.11.19
USART n RS485 Address Match register
(USARTn_RS485ADRMATCH) (n=0,1)
Address Offset: 0x40
This register contains the address match value for RS-485/EIA-485 mode.
Bit
Name
Description
Attribute
Reset
31:8
Reserved
R
0
7:0
MATCH[7:0]
The address value to be matched.
R/W
0
14.11.20
USART n RS485 Delay Value register (USARTn_RS485DLYV) (n=0,1)
Address Offset: 0x44
The user may program this register with a delay between the last stop bit leaving the TXFIFO and the de-assertion of
RTS
.
This delay time is in periods of the baud clock. Any delay time from 0 to 255 bit times may be programmed.
Bit
Name
Description
Attribute
Reset
31:8
Reserved
R
0
7:0
DLY[7:0]
The direction control (RTS) delay value. This register works in conjunction
with an 8-bit counter.
R/W
0
Содержание SN32F755
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