Z86D99 ZILOG [Zilog, Inc.], Z86D99 Datasheet - Page 49

• Manufacturer Part Number: Z86D99
• Description: Low-Voltage Micro controllers with ADC
• Manufacturer: ZILOG [Zilog, Inc.]

PS003807-1002
Figure 28. Timer Mode Register T
Figure 29. Prescaler 1 T
The T
PRE
select the T
For T
must be set to
values must be loaded into the down-counters by setting the Load bit D
to
Retrigger modes, so software loading is unnecessary.
Configure P5
1
before counting begins. Initial values are automatically loaded in Trigger and
1
1
1
bit D
to start counting as a result of a T
counter/timer clock source must be configured for external by setting
2
D
IN
to
5
2
operation.
1
as an input line by setting P5M bit D
0
. When using T
. The Timer Mode register bits D
D
4
P
R
IN
Operation
E
L
Timer Mode Register
Prescaler 1 Register
IN
(
D
(
I
IN
F1h
F3h
1
as an external clock or a gate input, the initial
R243 PRE1
Operation
M
R241 TMR
; Read/Write)
Z86D990/Z86D991 OTP and Z86L99X ROM
; Write Only)
I
Low-Voltage Microcontrollers with ADC
IN
N
input, the Enable Count bit D
A
T
External clock input = 00
Gate input = 01
Trigger input = 10
(non-retriggerable)
Trigger input = 11
(retriggerable)
Clock source
1 = T
0 = T
IN
5
R
modes
and D
2
1
1
Y
to
internal
external (T
1
4
.
can then be used to
IN
)
2
3
in TMR
in TMR
42