參數(shù)資料
型號： SC9318FB
廠商： 杭州士景電子有限公司
英文描述： DIGITAL TUNING SYSTEM
中文描述： 數(shù)字調(diào)諧系統(tǒng)
文件頁數(shù)： 12/36頁
文件大?。?/td> 671K
代理商： SC9318FB
Silan
Semiconductors
SC9318-033
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2002-01-16
12
(Continued)
Pin
No.
Symbol
Pin Name
Internal
Connection
Description
55
AM
IN
AM local
oscillator
signal input
R
fIN2
Programmable counter input pin for AM band.
The pulse swallow system (HF mode) and
direct dividing system (LF mode) are freely
selectable by program. At the HF mode, local
oscillation output (VCO output) of 1~45MHz
(0.2V
P-P
(Min))
is
input
and
LF
mode,
0.5~12MHz (0.2VP-P(Min)) is input.
Built-in input amp operates with low-level input
using a C coupling.
(Note) When in PLL OFF mode or when set to
FMIN input, the input is pulled down.
57
RESET
Reset input
Input pin for system reset signals.
RESET
takes place while at low level; at high
level, the program starts from address”0”.
Normally, if more than 1.8V is supplied to V
DD
when the voltage is 0, the system is reset
(Power on reset).
Accordingly, this pin should be set to high level
during operation.
58
X
OUT
59
X
IN
60
V
XT
Crystal
oscillator pins
R
fXT
V
XT
X
OUT
X
IN
R
OUT
Crystal oscillator pins.
A reference 75kHz crystal oscillator is
connected to the X
IN
and X
OUT
pins. The
oscillator stops oscillating during CKSTP
instruction execution.
The V
XT
pin is the power supply for the crystal
oscillator. A stabilizing capacitor (0.47
μ
F Typ.)
is connected.
(To be continued)
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參數(shù)描述
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