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參數(shù)資料
| 型號： | S1C60L02 |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 0.08 MHz, MICROCONTROLLER, PQFP60 |
| 文件頁數(shù)： | 12/102頁 |
| 文件大?。?/td> | 674K |
| 代理商： | S1C60L02 |
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S1C60N02 TECHNICAL MANUAL
EPSON
9
CHAPTER 2: POWER SUPPLY AND INITIAL RESET
When the oscillation circuit has been stopped until the
oscillation circuit begins to oscillate when the power is
turned on or for any other reason, the oscillation detection
circuit will output an initial reset signal, but since the
circuit may sometimes not operate normally with the initial
resetting due to the oscillation detection circuit, depending
on the method of making the power, you should utilize one
of the initial resetting methods indicated hereafter.
An initial reset can be invoked externally by making the
reset pin high. This high level must be maintained for at
least 5 ms (when oscillating frequency, fosc = 32 kHz),
because the initial reset circuit contains a noise rejection
circuit. When the reset pin goes low the CPU begins to
operate.
Another way of invoking an initial reset externally is to input
a high signal simultaneously to the input ports (K00–K03)
selected with the mask option. The specified input port pins
must be kept high for at least 4 sec (when oscillating fre-
quency fosc = 32 kHz), because of the noise rejection circuit.
Table 2.2.1 shows the combinations of input ports (K00–
K03) that can be selected with the mask option.
A
Not used
B
K00*K01
C
K00*K01*K02
D
K00*K01*K02*K03
When, for instance, mask option D (K00*K01*K02*K03) is
selected, an initial reset is executed when the signals input
to the four ports K00–K03 are all high at the same time.
If you use this function, make sure that the specified ports
do not go high at the same time during normal operation.
Oscillation detection
circuit
Reset pin (RESET)
Table 2.2.1
Input port combinations
Simultaneous high
input to input ports
(K00–K03)
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