Z80180 Datasheet, PDF (178/326 Pages) Zilog, Inc. – Z8018x Family MPU

Z 8018x Fam ily
M PU Us e r M anual
163
Table 23. Timer Output Control
TOC1
0
TOC0 OUTPUT
0 Inhibited
0
1 Toggled
1
00
1
11
(A18/TOUT pin is selected as an
address output function.)
A18/TOUT pin is selected as a
PRT1 output function!
Figure 64 illustrates timer initialization, count down, and reload timing.
Figure 65 depicts timer output (A18/TOUT) timing.
Timer Data Register
write (0004H)
RESET
0 < + < 20
20 φ 20 φ 20 φ 20 φ 20 φ 20 φ 20 φ
20 φ 20φ
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
Register Read
Figure 64. Timer Initialization, Count Down, and Reload Timing Diagram
UM005001-ZMP0400