Digi NS9215 User Manual
Page 401
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S E R I A L C O N T R O L M O D U L E : U A R T
Receive Character-Based Flow Control register
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401
Caution:
Be aware that if multiple matches occur, an XOFF assertion will supersede an
XON assertion.
Register
Register bit
assignment
13
12
11
10
9
8
7
6
5
4
3
2
1
0
15
14
31
29
28
27
26
25
24
23
22
21
20
19
18
17
16
30
EN
ABLE
Not used
MASK
Not used
DATA
Bits
Access
Mnemonic
Reset
Description
D31:11
R
Not used
0
Write this field to 0.
D10
R
FLOW_STATE
0x0
Flow control state
0
Hardware initiated XON
1
Hardware initiated XOFF
D09:08
R/W
FLOW4
0
Flow control enable
Allows you to define flow characteristics using the
DATA and MASK fields on the Receive Character
Match Control Register 4.
Note:
The ENABLE field has no effect on the
flow control logic.
The flow control is defined as shown:
0x
Disabled
10
Change the FLOW_STATE field to XON upon
match
11
Change the FLOW_STATE field to XOFF upon
match
D07:06
R/W
FLOW3
0
Flow control enable
Allows you to define flow characteristics using the
DATA and MASK fields on the Receive Character
Match Control Register 3.
Note:
The ENABLE field has no effect on the
flow control logic.
The flow control is defined as shown:
0x
Disabled
10
Change the FLOW_STATE field to XON upon
match
11
Change the FLOW_STATE field to XOFF upon
match