Timers; 8-Bit Timer Description; Timer Configuration Examples; Block Diagram Of 8-Bit Timers - Panasonic MN10285K User Manual

Timers

8-Bit Timer Description

4 Timers
All passages below assume a
clock B of 24 MHz.
OSC
MN102H75K/F75K/85K/F85K LSI User Manual
4.1 8-Bit Timer Description
The MN102H75K/85K contains four 8-bit timers that can serve as interval
timers, event timer/counters, clock generators (divide-by-2 output of the
underflow), reference clocks for the serial interfaces, or start timers for A/D con-
versions. The clock source can be the internal clock (oscillator frequency divided
by 2) or the external clock (1/4 or less the oscillator frequency input). A timer
interrupt is generated by a timer underflow.
The 8-bit timers are cascadable into true 16-bit timers. For instance, if you
cascade timers 0 and 1, timer 0 sends cascaded output to timer 1. The result is
true 16-bit division, rather than two successive 8-bit divisions.
Cascading Connections
8-bit x 4
16-bit
Clock output
Figure 4-1 Timer Configuration Examples
(To 16-bit timer, serial I/F)
TM0UDIR
(To 16-bit timer, serial I/F)
TM1UDIR
A/D conversion start
TMIA
TM2UDIR
UDF
TMIB
TM2
TMIC
TM3UDIR
TMIO
TMID
TMIA
UDF
TMIB
TM3
TMIC
TMIO
TMID
Note: B = 24 MHz
OSC
Figure 4-2 Block Diagram of 8-Bit Timers
77

Panasonic

Configuration example
8-bit 8-bit 8-bit
Interval Sync. UART
timer transfer transfer
clock clock
UDF
TM0O
TMIO
UDF
TMIO
TM1O
Panasonic Semiconductor Development Company
8-bit 16-bit
Event Event
timer timer
B /4
OSC
B /256
OSC
B /512
OSC
TMIA
B /64
TMIB OSC
TM0
TMIC
TM0I
TMID
TMIA
TMIB
TM1
TMIC
TM1I
TMID