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TMP86CS64AFG bảng dữ liệu(PDF) 126 Page - Toshiba Semiconductor

tên linh kiện TMP86CS64AFG
Giải thích chi tiết về linh kiện  8 Bit Microcontroller
PDF  202 Pages
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nhà sản xuất  TOSHIBA [Toshiba Semiconductor]
Trang chủ  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TMP86CS64AFG bảng dữ liệu(HTML) 126 Page - Toshiba Semiconductor

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Page 116
11. 8-Bit TimerCounter 4 (TC4)
11.1 Configuration
TMP86CS64AFG
11.3.3 Programmable Divider Output (PDO) Mode
The programmable divider output (PDO) mode is used to generated a pulse with a 50% duty cycle by count-
ing with the internal clock.
When a match between the up-counter and the TC4DR value is detected, the logic level output from the
PDO4 pin is switched to the opposite state and INTTC4 interrupt request is generated. The up-counter is
cleared at this time and then counting is continued. When a match between the up-counter and the TC4DR
value is detected, the logic level output from the PDO4 pin is switched to the opposite state again and INTTC4
interrupt request is generated. The up-counter is cleared at this time, and then counting and PDO are continued.
When the timer is stopped, the PDO4 pin is high. Therefore, if the timer is stopped when the PDO4 pin is
low, the duty pulse may be shorter than the programmed value.
Figure 11-2 PDO Mode Timing Chart
Example :Generating 1024 Hz pulse (fc = 16.0 Mhz)
LD
(TC4CR), 00000110B
: Sets the PDO mode. (TC4M
= 10, TC4CK = 001)
LD
(TC4DR), 3DH
: 1/1024
÷ 27/fc ÷ 2 (half cycle period) = 3DH
LD
(TC4CR), 00100110B
: Start TC4
Internal clock
Counter
Match detect
0
12
n
0
12
n 0
1
2
n 01
2
n 0
1
n
TC4DR
PDO4 pin
INTTC4 interrupt
request
Timer F/F



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