Z8S18020FSC Datasheet, PDF (13/70 Pages) Zilog, Inc. – ENHANCED Z180 MICROPROCESSOR

Zilog
Z80180/Z8S180/Z8L180
Enhanced Z180 Microprocessor
Reset
Timer Data Register
Write (0004H)
0 < t < 20 φ
20 φ 20 φ 20 φ 20 φ 20 φ 20 φ 20 φ 20 φ 20 φ
1
Timer Data
Register
FFFFH 0004H 0003H 0002H 0001H 0000H 0003H 0002H 0001H 0000H 0003H
Timer Reload
Register
TDE Flag
Timer Reload Register Write (0003H)
FFFFH 0003H
Write “1” to TDE
Reload
Reload
TIF Flag
Timer Data Register Read
Timer Control Requestor Read
Figure 5. Timer Initialization, Count Down, and Reload Timing
φ
TOUT
Timer Data Timer Data
Reg. = 0001H Reg. = 0000H
Figure 6. Timer Output Timing
DS971800401
PRELIMINARY
1-13