Z0847006PSG Zilog, Z0847006PSG Datasheet - Page 21

• Manufacturer Part Number: Z0847006PSG
• Description: IC 6MHZ Z80 NMOS DART 40-DIP
• Manufacturer: Zilog
• Series: Z80r

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

UM008101-0601
Structure of Channel Logic
From
Z80 CPU
priority. The CPU bus interface logic allows the CTC device to interface
directly to the CPU with no other external logic. However, port address
decoders and/or line buffers may be required for large systems. A block
diagram of the Z80 CTC is depicted in Figure 1.
Figure 1.
The structure of one of the four sets of Counter/Timer channel logic is
illustrated in Figure 2. This logic is composed of:
•
•
•
The registers consist of an 8-bit Time Constant register and an 8-bit
Channel Control register. The counters consist of an 8-bit CPU-readable
down-counter and an 8-bit prescaler.
Two registers
Two counters
Control logic
Control
Data
CTC Block Diagram
8
6
CPU
BUS
I/O
Internal Bus
RESET
Counter/Timer Channels
<   % 2 7 2 G T K R J G T C N U
Counter/
Interrupt
Internal
Control
Timer
Logic
Logic
Logic
7 U G T / C P W C N
3
4
INT
IEI
IEO
ZC/TO