Z8F16800144ZCOG Zilog, Z8F16800144ZCOG Datasheet - Page 120

• Manufacturer Part Number: Z8F16800144ZCOG
• Description: KIT DEV FOR Z8F642 MCU 44 PIN
• Manufacturer: Zilog
• Series: Z8 Encore!®r
• Type: MCUr

Specifications of Z8F16800144ZCOG

• Contents: Hardware, Software and Documentation
• For Use With/related Products: Z8F642
• For Use With: 269-4661 - KIT ACC ETHERNET SMART CABLE
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 269-4678

PS025011-1010
TxIN (ideal)
Noise Filter
Up/Dn Cntr
TxIN (noisy)
Noise Filter
Output
Noise Filter
Up/Dn Cntr
Noise Filter
Output
NEF
output
Timer
Clock
Input
Input
3 3 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3
3 3 2 1 0 0 0 0 0 0 1 2 1 0 0 0 0 0 1 0 1 2 3 3 3 3 2 3 3 3 3 3 3 3
switches from 0 to 1 when the counter counts up from 10 to 11. The Noise Filter delays the
receive data by three Timer Clock cycles.
The NEF output signal is checked when the filtered TxIN input signal is sampled. The
Timer samples the filtered TxIN input near the center of the bit time. The NEF signal
must be sampled at the same time to detect whether there is noise near the center of the bit
time. The presence of noise (NEF = 1 at center of bit time) does not mean the sampled data
is incorrect, rather it is intended to be an indicator of the level of noise in the network.
Data Bit = 0
Figure 13. Noise Filter Operation
Data Bit = 0
P R E L I M I N A R Y
nominal filter delay
Data Bit = 1
Data Bit = 1
Z8 Encore! XP
Product Specification
®
Clean TxIN
example
Noise TxIN
example
F1680 Series
Timers
106