參數(shù)資料
型號: SDA525X
廠商: SIEMENS AG
英文描述: ICs for Consumer Electronics
中文描述: 消費電子集成電路
文件頁數(shù): 90/143頁
文件大小: 1050K
代理商: SDA525X
SDA 525x
Semiconductor Group
90
1998-04-08
6.3.9
For easier infrared signal decoding, an additional Capture Compare Timer is
implemented. A functional overview is given in following feature list:
– 16-Bit-Counter with 2 or 3 prescaler bits selectable via SFR
– Counting rate: internal clock (18 MHz)
– Counter reloadable, prescaler bits reload with ‘0’
– Capture function
– Timer polling mode
– P3.3 or P3.2 selectable as capture input
– Capture on rising and/or falling edge
– Overflow-Bit
Capture Compare Timer
Infrared Timer Control Register IRTCON
Note: If counter is halted, a counter-reload with the contents of the reload registers is
forced by hardware to give the counter a starting value.
Infrared Timer Control
Register
Default after reset: 00
H
(MSB)
OV
IRTCON
SFR-Address E5
H
(LSB)
SEL
PR
PLG
REL
RUN
RISE
FALL
OV
will be set by hardware, if counter overflow has occurred; must
be cleared by software
PR
if cleared, 2-bit prescaler; if set, 3-bit prescaler
PLG
if set, Timer polling mode selected, capture function is
automatically disabled, reading capture registers will now
show current timer value
REL
if set, counter will be reloaded simultaneously with capture
event
RUN
run/stop the counter
RISE
capture (and if REL=‘1’, reload) on rising edge
FALL
capture (and if REL=‘1’, reload) on falling edge
SEL
if set, P3.3 is selected for capture input, otherwise P3.2
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