ADSP-TS101S Analog Devices, ADSP-TS101S Datasheet - Page 17

• Manufacturer Part Number: ADSP-TS101S
• Description: Embedded Processor
• Manufacturer: Analog Devices

Table 11. Pin Definitions—Link Ports (continued)
1
2
3
Table 12. Pin Definitions—Impedance and Drive Strength Control
1
2
3
Table 13. Control Impedance Selection
REV. A
Signal
L1DIR
L2DIR
L3DIR
Type column symbols: A = Asynchronous; G = Ground; I = Input; O = Output; o/d = Open drain output; P = Power supply;
pd = Internal pull-down approximately 100 k ; pu = Internal pull-up approximately 100 k ; T = Three-state
Term (for termination) column symbols: epd = External pull-down approximately 10 k to V
nc = Not connected; au = Always used.
Signal
CONTROLIMP2–1
CONTROLIMP0
DS2–0
Type column symbols: A = Asynchronous; G = Ground; I = Input; O = Output; o/d = Open drain output; P = Power supply;
pd = Internal pull-down approximately 100 k ; pu = Internal pull-up approximately 100 k ; T = Three-state
Term (for termination) column symbols: epd = External pull-down approximately 10 k to V
nc = Not connected; au = Always used.
CONTROLIMP2–0
000
001
010
011
100
101
110 (default)
111
The link port data pins, if connected or floated for extended periods (for example, token slave with no token master), do not require pull-ups or pull-downs
The internal pull-down may not be sufficient. A stronger pull-down may be necessary.
See
The internal pull-up may not be sufficient. A stronger pull-up may be necessary.
The internal pull-down may not be sufficient. A stronger pull-down may be necessary.
See
as there are no reliability issues and the worst-case power consumption for these floating inputs is negligible. Floating in this case means that these inputs
are not driven by any source and that dc-biased terminations are not present.
ELECTRICAL CHARACTERISTICS on Page 19
ELECTRICAL CHARACTERISTICS on Page 19
1
2
2
1
Type
O
O (pd
O (pd
Type
I (pu
I (pd
I (pu
3
3
)
)
3
3
3
)
)
)
ADC
dig_ctrl
0
0
0
reserved
1
reserved
1
reserved
Term
nc
au
nc
Term
au
au
au
Description
Link1 Direction. (0 = input, 1 = output)
Link2 Direction. (0 = input, 1 = output)
At reset this is a strap pin. For more information, see
Link3 Direction. (0 = input, 1 = output)
Description
Impedance Control. For ADC (Address/Data/Controls) and LINK (all link port
outputs) signals, the CONTROLIMP2–0 pins control impedance as shown in
Table
Digital Drive Strength Selection. Selected as shown in
strength calculation, see
for some pins is preset, not controlled by the DS2–0 pins. The pins that are
always at drive strength 7 (100%) are: CPA, DPA, and EMU.
for maximum and minimum current consumption for pull-up and pull-down resistances.
for maximum and minimum current consumption for pull-up and pull-down resistances.
LINK
dig_ctrl
0
0
1
reserved
0
reserved
1
reserved
0 = Disabled (maximum drive strength)
1 = Enabled (use DS2–0 drive strength selection)
13. These pins enable or disable dig_ctrl mode. When dig_ctrl:
–17–
Table 14. Drive Strength Selection
DS2–0
000
001
010
011
100
101
110
111 (default)
Output Drive Currents on Page
SS
SS
; epu = External pull-up approximately 10 k to V
; epu = External pull-up approximately 10 k to V
Drive Strength
Strength 0
Strength 1
Strength 2
Strength 3
Strength 4
Strength 5
Strength 6
Strength 7
ADSP-TS101S
Table 16 on Page
Table
31. The drive strength
14. For drive
DD-IO
DD-IO
18.