AM8530H AMD [Advanced Micro Devices], AM8530H Datasheet - Page 137

• Manufacturer Part Number: AM8530H
• Description: Serial Communications Controller
• Manufacturer: AMD [Advanced Micro Devices]

Register Description
6.2.15
WR14 contains some miscellaneous control bits. Bit positions for WR14 are shown in Fig-
ure 6–16.
Bits 7 and 5: Digital Phase-Locked Loop Command Bits
These three bits encode the eight commands for the Digital Phase-Locked Loop. A chan-
nel or hardware reset disables the DPLL, resets the missing clock latches, sets the
source to the RTxC pin and selects NRZI mode. The Enter Search Mode command en-
ables the DPLL after a reset.
Null Command (000). This command has no effect on the DPLL.
Write Register 14 (Miscellaneous Control Bits)
D
0
0
0
0
1
1
1
1
7
D
7
D
0
0
1
1
0
0
1
1
6
D
6
D
0
1
0
1
0
1
0
1
Figure 6–15. Write Register 13
Figure 6–16. Write Register 14
5
D
D
5
Null Command
Enter Search Mode
Reset Missing Clock
Disable DPLL
Set Source = BR Generator
Set Source = RTxC
Set FM Mode
Set NRZI Mode
4
D
4
D
3
D
D
3
2
D
D
2
1
D
1
D
0
D
0
BR Generator Enable
BR Generator Source
DTR/REQUEST Function
Auto Echo
Local Loopback
TC
TC
TC
TC
TC
TC
TC
TC
8
9
10
11
12
13
14
15
DPLL Commands
Upper Byte of
Time Constant
AMD
6–27