參數資料
型號： YSS920-SZ
元件分類： 消費家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP100
封裝： LEAD FREE, SQFP-100
文件頁數： 2/28頁
文件大?。?/td> 881K
代理商： YSS920-SZ
YSS920
10
5) Clock
XI and XO
Pins for connecting a crystal oscillator (12.288 to 15.000 MHz). Use a crystal oscillator with a fundamental
wave.
If an external clock is used, connect it to XI.
Internal operation clock (ck) is set with the oscillating frequency of this crystal oscillator and the setting of
the CKUP bit of the ERAM register.
CKUP=0
CKUP=1
I=12.288 MHz
CK=30.72 MHz CK=40.96 MHz
:
: (*)
XI=14.000 MHz CK=35.00 MHz CK=46.66MHz
:
XI=15.000 MHz CK=37.50 MHz
(*) When CK exceeds 40.96MHz, a restriction of “VDD2/AVDD(min)=2.54V” is imposed.
CPO, AVDD, and AVSS
Pins for connecting external elements for the PLL used to generate a clock pulse in the DSP section.
Connect resistor and capacitors near the CPO as shown below.
Connect decoupling capacitors near the pin between AVDD and AVSS.
CP
O
4700 pF
1 k
470 pF
AVD
D
AVS
S
+
10
F
0.1
F
+2.5 V
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