MC81F4332 Datasheet, PDF (131/198 Pages) Finechips – ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS

19.3 Timer 3 8-Bit Mode
MC81F4432
fxx/2048
fxx/512
fxx/128
fxx/32
fxx/16
fxx/8
fxx/4
fxx/2
fxt
Counter stop
M
EXT6
U
X
EINT1
T3CS
Data BUS
T3OVIE
Timer 3 overflow INT enable
M
OVF
T3OVIR
T3 Overflow
U
8
Timer 3 Overflow INT request Interrupt
T3OVIF
X
8-Bit Up Counter
(Read - only)
R
Clear
T3CC
Match signal
Clear
T3CR
8-Bit Comparator
Timer 3 Buffer Register
T3MIE
Timer 3 INT enable
Match
T3MIR
Timer 3 Match INT request
T3 Match
Interrupt
T3MIF
EXT6
Interrupt
Timer 3 Data Register
T3DR
8
Data BUS
T3CC
Overflow signal
Match signal
Figure 19-2 8-bit Timer 3 Block Diagram
Timer 3 has the following functional components:
- Clock frequency divider (fxx divided by 2048, 512, 128, 32, 16, 8, 4, 2, fxt) with multiplexer
- I/O pins for capture input, EXT6 (R10)
- 8-bit counter (T3CR), 8-bit comparator, and 8-bit reference data register (T3DR)
- Timer 3 status and control register (T3SCR)
- Timer 3 overflow interrupt and match interrupt generation
October 19, 2009 Ver.1.35
131