Z84C9008VSG Zilog, Z84C9008VSG Datasheet - Page 40

• 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

20
UM008005-0205
Z80 CPU
User’s Manual
Power-Down Release Cycle
RESET
HALT
HALT
CLK
NMI
M1
CLK
The system clock must be supplied to the CMOS Z80 CPU to release the
power-down state. When the system clock is supplied to the CLK input, the
CMOS Z80 CPU restarts operations from the point at which the power-
down state was implemented. The timing diagrams for the release from
power-down mode are featured in Figure 13 , 14 and 15.
When the HALT instruction is executed to enter the power-down state, the
CMOS Z80 CPU also enters the HALT state. An interrupt signal (either
NMI or ANT) or a RESET signal must be applied to the CPU after the
system clock is supplied in order to release the power-down state.
Figure 13. Power-Down Release Cycle No. 1
Figure 14. Power-Down Release Cycle No. 2
M1
T
1
T
2
T
3
T
4
T
1
T
1
T
2
T
3
Overview
T
4