AMIS-49200 Datasheet, PDF (7/22 Pages) AMI SEMICONDUCTOR – Fieldbus MAU Chip

AMIS-49200 Fieldbus MAU
Data Sheet
Table 1: Pin Numbers and Signal Description (Continued)
Signal Name Pin No. I/O (Note 1) Description
VDD
17
Digital
Supply
Supply voltage input for digital block
VCC
18
Analog
Supply
Analog supply voltage
CRT
19
AI/O
Current integration to limit output slew rate
VSS
20
Ground
Ground
VDRV
21
AO
Output of an operational amplifier for slew rate control. This signal can be fed
to current driver.
VSS
22
Ground
Ground
CCINP
23
AI
Non-inverting input of an operational amplifier for transmission current driver
CCINM
24
AI
Inverting input of an operational amplifier for transmission current driver
CCOUT
25
AO
Output of an operational amplifier for transmission current driver
MDS_CTRL
26
For POL = VDD MDS_CTRL should = VSS
AI
FOR POL = VSS MDS_CTRL can be tied to VDD or used as a not reset to
control when transmit communications will be enabled
SIGIN
27
AI
Input pin of the band-pass filter. This pin is connected to VMID bias level with
270K resister.
HPF
28
AI
Feedback signal of high-pass filter. This pin is connected to the output of an
opamp for high pass filter with 75K resistor.
LPF
29
AI
Non-inverting input of an operational amplifier for the low-pass filter
Input pin of low-pass filter for feedback. This pin is connected to the output of
FLT
30
AI
the high-pass filter through 20kΩ and the non-inverting input of the low-pass
filter through 54kΩ resisters.
FLTOUT
31
AO
Output of the operational amplifier for the low-pass filter. This signal is
internally connected to non-inverting input to form a voltage-follower.
CCD
32
AO
Current integration (for carrier detect circuit)
VSS
33
Ground
Ground
RXA
34
DO
MDS-MAU interface signal for received signal activity. This pin is a push-pull
output.
RXS
35
DO
MDS-MAU interface signal for received signal. This pin is a push-pull
output.
TXE
36
DIS
MDS-MAU interface signal for enable signal transmission (Schmitt Trigger
Input)
TXS
37
DIS
MDS-MAU interface signal for signal to be transmitted (Schmitt Trigger Input)
POL
38
DIS
Selects polarity of TxE input. When this pin is connected to GND, TxE is
active high. When this pin is connected to VDD, TxE is active low.
VSS
39
Ground
Ground
VSS
40
Ground
Ground
VSS
41
Ground
Connect to ground
VSS
42
Ground
Connect to ground
VSS
43
Ground
Connect to ground
VCC
44
Analog
Supply
Analog supply voltage
Note:
1.
AI = Analog Input, AO = Analog Output, AI/O = Analog Input/Output, DIS = CMOS Digital Input (Schmitt Trigger),
DO = CMOS Digital Output.
AMI Semiconductor – Jan. 07, M-20532-003
7
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