Z8S180 Zilog., Z8S180 Datasheet - Page 179

• Manufacturer Part Number: Z8S180
• Description: ENHANCED Z180 MICROPROCESSOR
• Manufacturer: Zilog.

164
UM005001-ZMP0400
Z 8018x Fam il y
M PU Us e r M anual
TIE0
TIF0
TIF1
TIE1
Figure 65.
PRT Interrupts
The PRT interrupt request circuit is illustrated in Figure 66.
Figure 66.
PRT and RESET
During RESET, the bits in TCR are initialized as defined in the TCR
register description. Down counting is stopped and the TMDR and RLDR
registers are initialized to
address output function.
TOUT
Phi
Timer Output Timing Diagram
PRT Interrupt Request Generation
Timer Data
Reg. = 0001H
IEF1
FFFFH
. The A18/TOUT pin reverts to the
Timer Data
Reg. = 0000H
PRT1 Interrupt
Request
PRT0 Interrupt
Request