Digi NS9215 User Manual
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S E R I A L C O N T R O L M O D U L E : H D L C
HDLC Control Register 1
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H D L C C o n t r o l R e g i s t e r 1
Address: 9002_9110
HDLC Control Register 1 configures the HDLC transmitter and receiver.
Register
Register bit
assignment
assignment
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H D L C C o n t r o l R e g i s t e r 2
Address: 9002_9114
HDLC Control Register 2 configures the HDLC transmitter and receiver.
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
Reserved
CLK
Reserved
HDATA
HDATA
Not
used
HINT
Bits
Access
Mnemonic
Reset
Description
D31:08
R
Not used
0
Write this field to 0.
D07:06
R
HMODE
0
00
Normal operation
01
Force receiver to flag search mode
10
Normal operation
11
Force transmitter to send abort
D05:04
N/A
Reserved
N/A
N/A
D03:02
R/W
CLK
0
Clock source
Note:
This field should be programmed last
00
Reserved
01
Reserved
10
Use external clock
11
Use internal clock
D01
R/W
Not used
0
Always write 0 to this bit.
D00
R/W
HINT
0
0
Disable the HDLC interrupt
1
Enable the HDLC interrupt