ZiLOG Z8 - Indirect Register Addressing (IR)

3047-023. 3047-024
R245 PREO
Prescaler 0 Register
(% F5; Write Only)
~
COUNTMODE
o = To SINGLE·PASS
1 = To MODULO·N
RESERVED
PRESCALER
MODULO
L-------(RANGE: 1-64 DECIMAL
01-00 HEX)
figure 11-21. Prescaler 0 Reset
R241 TMR
Timer Mode Register
(% F1; Read/Write)
10101010101010101
TOUT MODES I
TOUT OFF = 00
To OUT = 01
~
L 0 = NO FUNCTION
1 = LOAD To
T1 OUT = 10
INTERNAL CLOCK OUT = 11
TIN MODES
EXTERNAL CLOCK INPUT = 00
GATE INPUT = 01
TRIGGER INPUT = 10
(NON·RETRIGGERABLE)
TRIGGER INPUT
= 11
(RETRIGGERABLE)
o = DISABLE To COUNT
1 = ENABLE To COUNT
o = NO FUNCTION
1 = LOAD T1
'-- ___ 0 = DISABLE T1 COUNT
1 = ENABLE T1 COUNT
Figure 11-22. T~r Hode Register Reset
Counter/Timers
11-9