Z16M1720ASG1868 Zilog, Z16M1720ASG1868 Datasheet - Page 80

• Manufacturer Part Number: Z16M1720ASG1868
• Description: IC PCMCIA INTERFACE 100-VQFP
• Manufacturer: Zilog

Specifications of Z16M1720ASG1868

• Applications: *
• Interface: *
• Voltage - Supply: *
• Package / Case: 100-LQFP
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIN DESCRIPTION
UM008101-0601
<   % 2 7 2 G T K R J G T C N U
7 U G T / C P W C N
Table 10. Events and Actions
The following pin descriptions detail the function of the Z80 DMA external
pins as illustrated in Figure 25 through Figure 28.
A15-A0
System Address Bus (output, tristate). Addresses generated by the DMA are
sent to both source and destination ports, either of which may be main
memory or I/O peripherals.
Event
End-of-Block
Byte Match (Compare)
Pulse-control byte matches lower part of
byte counter
READY Inactive
READY Active
RETI Instruction (return from interrupt
instruction from the Z80 CPU)
Actions Possible When Event
Occurs
1. Release Bus
2. Interrupt CPU
3. Auto Restart
1. Release Bus
2. Interrupt CPU
3. Continue
1. Generate Pulse
1. Release Bus
2. Suspend (continuous mode
only)
1. Request Bus
2. Interrupt CPU
1. Request Bus
Direct Memory Access