Z84C9008VSG Zilog, Z84C9008VSG Datasheet - Page 48

• Manufacturer Part Number: Z84C9008VSG
• Description: IC 8MHZ Z80 KIO 84-PLCC
• Manufacturer: Zilog
• Series: Z80r

Specifications of Z84C9008VSG

• Processor Type: Z80
• Features: Serial/Parallel Input/Output, Counter/Timer Circuit
• Speed: 8MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 84-LCC (J-Lead)
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Cpu Speed: 8MHz
• Digital Ic Case Style: LCC
• No. Of Pins: 84
• Supply Voltage Range: 5V
• Operating Temperature Range: 0°C To +70°C
• Svhc: No SVHC (18-Jun-2010)
• Rohs Compliant: Yes
• Base Number: 84
• Clock Frequency: 8MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

28
UM008005-0205
Z80 CPU
User’s Manual
+5V
Figure 17. Minimum Z80 Computer System
Because the Z80 CPU requires only a single 5V power supply, most small
systems can be implemented using only this single supply.
The external memory can be any mixture of standard RAM, ROM, or
PROM. In Figure 17, a single 8K bit ROM (1 Kbytes) comprises the entire
memory system. The Z80 internal register configuration contains sufficient
Read/Write storage, requiring no external RAM memory.
I/O circuits allow computer systems to interface with the external devices.
In Figure 17, the output is an 8-bit control vector and the input is an 8-bit
status word. The input data can be gated to the data bus using any standard
three-state driver while the output data can be latched with any type of stan-
dard TTL latch. A Z80 PIO serves as the I/O circuit. This single circuit
attaches to the data bus as indicated and provides the required 16 bits of
TTL compatible I/O. (Refer to the Z80 CPU Peripherals User’s Manual for
details on the operation of this circuit.) This powerful computer is built with
only three LSI circuits, a simple oscillator, and a single 5V power supply.
RESET
OSC
CPU
Z80
CLK
A
MREQ
RD
Data Bus
IORQ
M1
9
–A
0
Hardware and Software Implementation Examples
CE1
CE2
CE RD
IORQ
M1
Output Data
Port A
+5V Power Supply
+5V
Z80-PIO
8K Bit
ROM
Address
Data
OUT
Input Data
IN
Port B
GND
CLK
C/D
B/A
A
A
0
1