Z0847006PSG Zilog, Z0847006PSG Datasheet - Page 201
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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Price
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Part Number:
Z0847006PSG
Manufacturer:
Zilog
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< % 2 7 2 G T K R J G T C N U
7 U G T / C P W C N
Φ
System Clock (input). The Z80 PIO uses the standard Z80 system clock to
synchronize certain signals internally. This is a single phase clock.
M1
Machine Cycle One Signal from CPU (input, active Low). This signal
from the CPU is used as a sync pulse to control several internal PIO opera-
tions. When M1 is active and the RD signal is active, the Z80 CPU is
fetching an instruction from memory. Conversely, when M1 is active and
IORQ is active, the CPU is acknowledging an interrupt. In addition, the M1
signal has two other functions within the Z80 PIO.
1. M1 synchronizes the PIO interrupt logic.
2. When M1 occurs without an active RD or IORQ signal, the PIO logic
enters a reset state.
IORQ
Input/Output Request from Z80 CPU (input, active Low). The IORQ
signal is used in conjunction with the B/ A Select, C/D Select, CE, and
RD signals to transfer commands and data between the Z80 CPU and the
Z80 PIO. When CE, RD, and IORQ are active, the port addressed by B/A
transfers data to the CPU (a read operation). Conversely, when CE and
IORQ are active but RD is not active, then the port addressed by B/A is
written to from the CPU with either data or control information as speci-
fied by the C/D Select signal. Also, if IORQ and M1 are active simulta-
neously, the CPU is acknowledging an interrupt and the interrupting port
automatically places its interrupt vector on the CPU data bus if it is the
highest priority device requesting an interrupt.
RD
Read Cycle Status from the Z80 CPU (input, active Low). If RD is active,
a MEMORY READ or I/O READ operation is in progress. The RD signal
is used with B/A Select, C/D Select, CE, and IORQ signals to transfer data
from the Z80 PIO to the Z80 CPU.
UM008101-0601
Parallel Input/Output
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