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7733 bảng dữ liệu(PDF) 142 Page - Renesas Technology Corp

tên linh kiện 7733
Giải thích chi tiết về linh kiện  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  940 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7733 bảng dữ liệu(HTML) 142 Page - Renesas Technology Corp

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TIMER A
7733 Group User’s Manual
6–31
[Precautions in event counter mode]
1. While counting is in progress, by reading out the timer Ai register, the counter value can be read at an
arbitrary timing. However, when reading is performed at the reload timing shown in Figure 6.4.11, value
“FFFF16” is read out at an underflow and value “000016” is read out at an overflow. If reading is performed
in the period from when a value is set into the timer Ai register with the counter stopped until the counter
starts counting, the set value is correctly read out.
6.4 Event counter mode
Fig. 6.4.11 Timer Ai register read out
2. Pin TAiOUT is used for all functions listed below. Therefore, only one of the following functions can be
used for one timer.
q Switching between countup and countdown by pin TAiOUT’s input signal
q Pulse output function
q Two-phase pulse signal processing function (Timers A2 to A4)
21
0
n
n – 1
Counter value
(Hex.)
21
0
FFFF n – 1
Read value
(Hex.)
Reload
Time
n = Reload register’s contents
(1) While counting down
FFFD FFFE FFFF
n
n + 1
FFFD FFFE FFFF 0000 n + 1
(2) While counting up
Counter value
(Hex.)
Read value
(Hex.)
Reload
Time
n = Reload register’s contents



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