Z85C3010PSG Zilog, Z85C3010PSG Datasheet - Page 257
Z85C3010PSG
Manufacturer Part Number
Z85C3010PSG
Description
IC 10MHZ Z8500 CMOS SCC 40-DIP
Manufacturer
Zilog
Series
SCCr
Specifications of Z85C3010PSG
Processor Type
Z80
Features
Error Detection and Multiprotocol Support
Speed
10MHz
Voltage
5V
Mounting Type
Through Hole
Package / Case
40-DIP (0.620", 15.75mm)
Cpu Speed
8MHz
Digital Ic Case Style
DIP
No. Of Pins
40
Supply Voltage Range
5V
Operating Temperature Range
0°C To +70°C
Svhc
No SVHC (18-Jun-2010)
Base Number
85
Rohs Compliant
Yes
Clock Frequency
10MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
269-3934
Z85C3010PSG
Z85C3010PSG
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Application Note
Boost Your System Performance Using The Zilog ESCC
RECEIVE FIFO INTERRUPT
In the ESCC, receive interrupt frequencies are reduced
due to a deeper Receive FIFO and the revised receive
interrupt structure.
If WR7' D3 Receive FIFO Interrupt Level bit is reset, the
ESCC generates the receive character available interrupt
on every received character. This is compatible with SCC
Receive Character Available Interrupt. If WR7' D3 is set,
the Receive Character Available Interrupt is triggered
6-122
Figure 5. Flowchart of Receive Interrupt Service Routine to Reduce Receive Interrupt Frequencies
RX FIFO Have
Been Read
All Data in
RX FIFO
Empty
NO
™
From RX FIFO
Level Enabled
RCA Interrupt
when the Receive FIFO is half full; the first four locations
from the entry are still empty. By enabling the receive FIFO
interrupt level, together with polling the Receive Character
Available (RCA) bit in RR0, the receive interrupt
frequencies are reduced significantly. Receive data is read
in blocks of four bytes (Figure 5). This would help to offload
systems which have a long interrupt latency and heavily
loaded Operating Systems.
RX FIFO Int.
Read Data
RCA = '1'?
Service
RR0
YES
UM010901-0601
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