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STR720 bảng dữ liệu(PDF) 325 Page - STMicroelectronics

tên linh kiện STR720
Giải thích chi tiết về linh kiện  ARM720T 16/32-BIT MCU WITH 16K RAM, USB, CAN, 3 TIMERS, ADC, 6 COMMUNICATIONS INTERFACES
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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STR720 bảng dữ liệu(HTML) 325 Page - STMicroelectronics

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STR720 - EXTENDED FUNCTION TIMER (EFT)
325/401
Note
All formulas in this chapter assume that APB_CLK is the clock driving the EFT. If
External clock (FEXT) is selected, replace (FAPB / TPRESC) by FEXT., where TPRESC =
(CC7..CC0 + 1).
21.4 Register Description
Each Timer is associated with two control and one status registers, and with six pairs of data
registers (16-bit values) relating to the two input captures, the two output compares, the
counter. Every register can have only an access by 16 bits, that means is not possible to read
or write only a byte.
Input Capture A Register (ICAR)
Address Offset: 00h
Reset value: xxxxh
This is a 16-bit read only register that contains the counter value transferred by the Input
Capture A event.
Figure 55. Pulse Width Modulation Input Mode Timing
15
14
13
12
11
10
9
8
765432
1
0
MSB
LSB
rrrrrr
r
r
rrrrr
r
r
r
COUNTER 34E2
0000
0001
2ED0 2ED1 2ED2
34E2 0000
ICAPA
capture A
capture B
capture A
0002
PERIOD = ICAPA
PULSE LENGTH = ICAPB
Capture A,
period measurement,
reset counter
Interrupt
Capture B,
pulse width measurement
1



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