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ST10F268 数据表(PDF) 29 Page - STMicroelectronics

部件名 ST10F268
功能描述  16-BIT MCU WITH 256K BYTE FLASH MEMORY AND 8K BYTE RAM
PDF  74 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST10F268 数据表(HTML) 29 Page - STMicroelectronics

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The state of this latch may be used to clock timer
T5, or it may be output on a port pin (T6OUT).
The overflows / underflows of timer T6 can also be
used to clock the CAPCOM timers T0 or T1, and
to cause a reload from the CAPREL register.
The CAPREL register can capture the contents of
T5 from an external signal transition on the
corresponding port pin (CAPIN), and T5 may be
optionally cleared after the capture procedure.
This allows absolute time differences to be
measured or pulse multiplication to be performed
without software overhead.
The capture trigger (timer T5 to CAPREL) may
also be generated on transitions of GPT1 timer T3
inputs T3IN and / or T3EUD. This is useful when
T3 operates in Incremental Interface Mode.
Table 15 GPT2 timer input frequencies, resolution
and periods lists the timer input frequencies, reso-
lution and periods for each pre-scaler option at
25MHz CPU clock. This also applies to the Gated
Timer Mode of T6 and to the auxiliary timer T5 in
Timer and Gated Timer Mode.
Table 15 : GPT2 timer input frequencies, resolution and periods
fCPU = 25MHz
Timer Input Selection T5I / T6I
000b
001b
010b
011b
100b
101b
110b
111b
Pre-scaler Factor
4
8
16
32
64
128
256
512
Input Frequency
6.25MHz 3.125MHz 1.563MHz 781.3KHz
390KHz
195.3KHz 97.66KHz 48.83KHz
Resolution
160ns
320ns
640ns
1.28µs
2.56µs
5.12µs
10.24µs
20.48µs
Period
10.49ms
21.0ms
41.9ms
83.9ms
167ms
336ms
671ms
1.34s
Figure 6 : Block Diagram of GPT1
2n n=3...10
2n n=3...10
2n n=3...10
T2EUD
T2IN
CPU Clock
CPU Clock
CPU Clock
T3EUD
T4IN
T3IN
T4EUD
T2
Mode
Control
T3
Mode
Control
T4
Mode
Control
GPT1 Timer T2
GPT1 Timer T3
GPT1 Timer T4
T3OTL
Reload
Capture
U/D
U/D
Reload
Capture
Interrupt
Request
Interrupt
Request
Interrupt
Request
T3OUT
U/D



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