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7220 bảng dữ liệu(PDF) 127 Page - Renesas Technology Corp

tên linh kiện 7220
Giải thích chi tiết về linh kiện  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  303 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7220 bảng dữ liệu(HTML) 127 Page - Renesas Technology Corp

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2-100
7220 Group User’s Manual
FUNCTIONAL DESCRIPTION
2.16 Clock generating circuit
Fig. 2.16.1 Clock generating circuit block diagram
2.16 Clock generating circuit
Oscillation circuit consists of an “oscillation gate” which operates as an amplifier to provide the gain required
for oscillation and an “oscillating control flip-flop” to control this. Because of that, it is possible to start and
stop oscillating as required. For details concerning start and stop of oscillation, refer to “2.14 Low-power
dissipation mode.” Figure 2.16.1 shows the clock generating circuit block diagram.
Interrupt request
Interrupt disable
flag I
Reset
SQ
R
STP instruction
SQ
R
WIT
instruction
S
Q
R
STP
instruction
Reset
Internal clock
φ
1/2
1/8
Timer 3
Timer 4
XOUT
XIN
T34M0
T34M2
Selection gate :
Connected to black
side at reset.
.
T34M : Timer 34 mode register



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