Z0847006PSG Zilog, Z0847006PSG Datasheet - Page 36
Z0847006PSG
Manufacturer Part Number
Z0847006PSG
Description
IC 6MHZ Z80 NMOS DART 40-DIP
Manufacturer
Zilog
Series
Z80r
Datasheet
1.Z0847006PSG.pdf
(330 pages)
Specifications of Z0847006PSG
Processor Type
Z80
Features
Dual Channel Asynchronous Receiver/Transmitter (DART)
Speed
6MHz
Voltage
5V
Mounting Type
Through Hole
Package / Case
40-DIP (0.620", 15.75mm)
Mounting Style
Through Hole
Cpu Speed
6MHz
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
847006
Rohs Compliant
Yes
Clock Frequency
6MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
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Manufacturer
Quantity
Price
Company:
Part Number:
Z0847006PSG
Manufacturer:
Zilog
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CTC PROGRAMMING
UM008101-0601
< % 2 7 2 G T K R J G T C N U
7 U G T / C P W C N
Overview
Timing may be initialized automatically or with a triggering edge at the
channel’s Timer Trigger (CLK/TRG) input. This timing is determined by
programming bit 3 of the channel control word. If bit 3 is reset?, the timer
automatically begins operation at the start of the CPU cycle following the I/
O Write machine cycle that loads the time constant data word to the
channel.
If bit 3 is set, the timer begins operation on the second succeeding rising
edge of Φ after the Timer Trigger edge following the loading of the time
constant data word.
If no time constant word is to follow, the timer begins operation on the
second succeeding rising edge of Φ after the Timer Trigger edge and
following the control word write cycle. Bit 4 of the channel control word is
pre programmed to select whether the Timer Trigger is sensitive to a rising
or falling edge. There is no setup requirement between the active edge of
the Timer Trigger and the next rising edge of Φ.
If the Timer Trigger edge occurs closer than a specified minimum setup
time to the rising edge of Φ, the down-counter does not begin decrementing
until the following rising edge of Φ. If bit 7 in the channel control word is
set, the zero-count condition in the down-counter causes a pulse at the
channel’s Time Out pin, and initiates an interrupt request sequence. (For
more details, see “CTC Interrupt Servicing” on page 27).
To begin counting or timing operations, a Channel Control Word and Time
Constant Data Word are written to the appropriate channel by the CPU.
These words are stored in the Channel Control or Time Constant registers
of each channel. If a channel has been programmed to enable interrupts, an
interrupt vector is written to the appropriate register in the CTC. Because of
Counter/Timer Channels
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