Z16M1720ASG1868 Zilog, Z16M1720ASG1868 Datasheet - Page 329
Z16M1720ASG1868
Manufacturer Part Number
Z16M1720ASG1868
Description
IC PCMCIA INTERFACE 100-VQFP
Manufacturer
Zilog
Datasheet
1.Z0847006PSG.pdf
(330 pages)
Specifications of Z16M1720ASG1868
Applications
*
Interface
*
Voltage - Supply
*
Package / Case
100-LQFP
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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4. Channel A External/Status Routine Complete, RETI Issued, Channel B Transmitter Service Resumed.
2. Channel B Transmitter Interrupts and is Acknowledged.
3. External/Status Channel A Interrupts Suspending Service of Channel B Transmitter.
5. Channel B Transmitter Service Routine Complete, Second RETI Issued.
1. Priority Interrupt Daisy Chain before Any Interrupt Occurs.
High
High
High
High
High
IEI
IEI
IEI
IEI
IEI
Channel A
Receiver
IEO
IEO
IEO
IEO
IEO
executed or a RETI command is written to the Z80 SIO, resetting the
interrupt-under-service latch of the Channel A interrupt. At this time, the
service routine for Channel B is resumed. When the service routine is
completed, another RETI instruction is executed to complete the interrupt
service.
Figure 132. Typical Interrupt Service
High
High
High
High
High
Transmitter
IEI
IEI
Channel A
IEI
IEI
IEI
IEO
IEO
IEO
IEO
IEO
High
High
High
High
High
External Status
IEI
IEI
IEI
IEI
IEI
Channel A
IEO
IEO
IEO
IEO
IEO
High
High
High
High
High
IEI
IEI
IEI
IEI
IEI
Channel B
Receiver
IEO
IEO
IEO
IEO
IEO
High
High
High
High
High
Service Completed
Service Resumed
Service Suspended
Under Service
IEI
IEI
IEI
IEI
Transmitter
IEI
Channel B
Z80 CPU Peripherals
IEO
IEO
IEO
IEO
IEO
Serial Input/Output
High
High
Low
Low
Low
User Manual
External Status
IEI
IEI
IEI
IEI
IEI
Channel B
IEO
IEO
IEO
IEO
IEO
High
Low
Low
High
Low
309
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