User manual
...the world's most energy friendly microcontrollers
2012-04-24 - Giant Gecko Family - d0053_Rev0.96 507
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Bit Name Reset Access Description
Value Mode Description
0 ONE One stop-bit is transmitted with every frame
1 TWO Two stop-bits are transmitted with every frame
3:2 PARITY 0x0 RW Parity-Bit Mode
Determines whether parity bits are enabled, and whether even or odd parity should be used.
Value Mode Description
0 NONE Parity bits are not used
2 EVEN Even parity are used. Parity bits are automatically generated and checked by hardware.
3 ODD Odd parity is used. Parity bits are automatically generated and checked by hardware.
1 DATABITS 0 RW Data-Bit Mode
This register sets the number of data bits.
Value Mode Description
0 EIGHT Each frame contains 8 data bits
1 NINE Each frame contains 9 data bits
0 AUTOTRI 0 RW Automatic Transmitter Tristate
When set, LEUn_TX is tristated whenever the transmitter is inactive.
Value Description
0 LEUn_TX is held high when the transmitter is inactive. INV inverts the inactive state.
1 LEUn_TX is tristated when the transmitter is inactive
19.5.2 LEUARTn_CMD - Command Register (Async Reg)
For more information about Asynchronous Registers please see Section 5.3 (p. 20) .
Offset Bit Position
0x004
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
Reset
0
0
0
0
0
0
0
0
Access
W1
W1
W1
W1
W1
W1
W1
W1
Name
CLEARRX
CLEARTX
RXBLOCKDIS
RXBLOCKEN
TXDIS
TXEN
RXDIS
RXEN
Bit Name Reset Access Description
31:8 Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
7 CLEARRX 0 W1 Clear RX
Set to clear receive buffer and the RX shift register.
6 CLEARTX 0 W1 Clear TX
Set to clear transmit buffer and the TX shift register.
5 RXBLOCKDIS 0 W1 Receiver Block Disable
Set to clear RXBLOCK, resulting in all incoming frames being loaded into the receive buffer.
4 RXBLOCKEN 0 W1 Receiver Block Enable
Set to set RXBLOCK, resulting in all incoming frames being discarded.
3 TXDIS 0 W1 Transmitter Disable
Set to disable transmission.
2 TXEN 0 W1 Transmitter Enable
Set to enable data transmission.