R5F21133DFP RENESAS [Renesas Technology Corp], R5F21133DFP Datasheet - Page 96
R5F21133DFP
Manufacturer Part Number
R5F21133DFP
Description
16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY/R8C/Tiny SERIES
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.R5F21133DFP.pdf
(224 pages)
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R8C/13 Group
Rev.1.20
REJ09B0111-0120
Table 12.8 Programmable Waveform Generation Mode Specifications
Count source
Count operation
Output waveform width
and period
Count start condition
Count stop condition
Interrupt request generation timing In half of count source, after Timer Y underflows during secondary period (at the same
INT2/CNTR
Read from timer
Write to timer
Select function
12.2.2 Programmable Waveform Generation Mode
In this mode, an signal output from the TY
the values in the TYPR register and TYSC register are counted alternately (see “Table 12.8 Program-
mable Waveform Generation Mode Specifications”). A counting starts by counting the set value in the
TYPR register. Figure 12.16 shows the TYZMR register in programmable waveform generation mode.
Figure 12.17 shows the operation example.
NOTES:
Jan 27, 2006
1. Even when counting the secondary period, read out the TYPR register.
2. The set value in the TYPR register and TYSC register are enabled by writing a value to the TYPR register.
3. The TYOCNTbit is enabled in the following timings
The written values are reflected to the waveform output from the next primary period after writing to the TYPR
register.
Item
• When count starts
• When Timer Y interrupt request is generated
Therefore, pulse is output from the next primary period depending on the setting value of the TYOCNT bit.
1
pin functions
page 85 of 205
f
• Down count
• When the timer underflows, it reloads the contents of primary reload register and sec-
Primary period
Secondary period : (n+1)(p+1)/f
Period
n: set value in PREY register, m: set value in TYPR register, p: set value in TYSC register
f
Write “1” (count start) to TYS bit in TYZMR register
Write “0” (count stop) to TYS bit in TYZMR register
time as the CNTR
Pulse output
Use timer mode when using this pin as a programmable I/O port.
Count value can be read out by reading TYPR register.
Same applies to PREY register
Value written to TYPR register is written to only reload register.
Same applies to TYSC register and PREY register
• Output level latch select function
• Programmable waveform generation output switching function
1
i
ondary reload register alternately before continuing counting.
The output level during primary and secondary periods is selected by the TYOPL bit.
When the TYOCNT bit in the TYZOC register is set to “0”, the output from TY
inverted synchronously when Timer Y underflows during the secondary period. And
when set to “1”, a value in the P3_2 bit is output from TY
Y underflows during the secondary period
, f
: Count source frequency
8
, f
RING
1
: (n+1)(m+1)/f
: (n+1){(m+1)+(p+1)}/f
output change) [Timer Y interrupt].
OUT
pin is inverted each time the counter underflows, while
(1)
i
i
.
Specification
i
(3)
.
(2)
.
OUT
synchronously when Timer
12.2 Timer (Timer Y)
OUT
is
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