z02201 ZiLOG Semiconductor, z02201 Datasheet - Page 76

• Manufacturer Part Number: z02201
• Description: Z02201 V.22bis Data Pump With Integrated Afe
• Manufacturer: ZiLOG Semiconductor

Eye Pattern Circuit
PS000904-0107
Figure 16
evaluation board, and can be used with modem components such as the ZiLOG
Z02201 and Z02201 that have an eye pattern interface. The Z02201 Eye Pattern
port consists of 3 signals:
Data (EYEOUT)—
are the X and Y coordinates respectively for the eye pattern display. Each byte is
most significant bit first.
Clock (EYECLK)—
read on the falling edge.
Strobe (EYESTB)—
Data is shifted through a pair of 8 bit serial-in parallel-out shift registers (74HC594)
in response to the falling edge of EYECLK, then latched into a pair of 8 bit DACs
on the rising edge of EYESTB. The output of these DACs can be viewed on an
oscilloscope in X–Y mode to see the received signal quality.
is the eye pattern circuitry used in the Z0220100ZCO modem
The most significant and least significant bytes of this 16 bit word
Data is set on the rising edge of the EYECLK, and should be
This signal is active Low when the data is valid.
Figure 16. Eye Pattern Circuit
V.22BIS Data Pump with Integrated AFE
Z02201
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