AM7992 Advanced Micro Devices, AM7992 Datasheet - Page 5

• Manufacturer Part Number: AM7992
• Description: Serial Interface Adapter (SIA)
• Manufacturer: Advanced Micro Devices

X
Biased Crystal Oscillator (Input)
X
nected for crystal operation, the system clock that ap-
pears at TCLK is half the frequency of the crystal
oscillator. X
two times the data rate.
RF
Frequency Setting Voltage-Controlled Oscillator
(V
This loop filter output is a reference voltage for the re-
ceive path phase detector. It also is a reference for tim-
ing noise immunity circuits in the collision and receive
enable path. Nominal reference V
frequency MHz/V.
PF
Receive Path V
This loop filter input is the control for receive path loop
damping. Frequency of the receive V
ited to transmit frequency 12%. Nominal receive V
gain is 0.25 reference V
1
1
CO
, X
is the input and X
) Loop Filter (Output)
2
1
may be driven from an external source of
CO
Phase-Locked Loop Filter (Input)
2
is the bypass port. When con-
CO
gain MHz/V.
CO
CO
gain is 1.25 TCLK
is internally lim-
CO
Am7992B
TEST
Test Control (Input)
A static input that is connected to V
Am7990 operation and to ground for testing of
Receive path threshold and RCLK output HIGH
parameters. When TEST is grounded, RX is enabled
and RCLK is enabled except during clock acquisition,
when RCLK is HIGH.
GND1
High Current Ground
GND2
Logic Ground
GND3
Voltage-Controlled Oscillator Ground
V
High Current and Logic Supply
V
Voltage-Controlled Oscillator Supply
CC1
CC2
CC
for Am7992B/
5