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7733 bảng dữ liệu(PDF) 884 Page - Renesas Technology Corp

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Giải thích chi tiết về linh kiện  16-BIT SINGLE-CHIP MICROCOMPUTER
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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17–4
APPLICATIONS
7736 Group User’s Manual
17.4 Power saving
(2) Initial settings for related registers
Fig. 17.4.1 Initial settings for related registers
Pins KI0 to KI3 are pulled high.
Port P10 direction register (address 1816)
Pins P100 to P103: Output mode
b7
b0
00
0
Pins P104 to P107 (KI0 to KI3): Input mode
01 1
1 1
X: It may be “0” or “1.”
Pins P100 to P103’s output (scan output) level: “L”
b7
b0
Port P10 register (address 1616)
0000
Key input interrupt function is selected.
Must be fixed to “0.”
b7
b0
Port function control register (address 6D16)
11
0
Interrupt disable flag (I)
b7
b0
INT2
/Key input interrupt control register (address 7F16)
0
00
Interrupt priority level is set. (Note that a value other than “0002” is set.)
Interrupt request bit: 0 (Initialized)
Must be fixed to “0.”
“0”: Interrupt is enabled.
Must be fixed to “0.”
An external clock is selected as the main clock.
Watchdog timer is not used when the stop mode is terminated.
Oscillation circuit control register 1 (address 6F16) (Note)
b7
b0
X
0
1
0
Pin P64/INT2 is not used for the key input interrupt.
Note: When writing a value to this register, write a value of “5516” by using the LDM instruction,
and then write a value of “0A16.” (Refer to Figure 11.2.4.)
X
X
X
X
X



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