- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45233 > MC68HC16S2CPU20 (MOTOROLA INC) 16-BIT, 20.97 MHz, MICROCONTROLLER, PQFP100 PDF資料下載
參數(shù)資料
| 型號： | MC68HC16S2CPU20 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, 20.97 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | TQFP-100 |
| 文件頁數(shù)： | 13/104頁 |
| 文件大小： | 640K |
| 代理商： | MC68HC16S2CPU20 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁當(dāng)前第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁
MOTOROLA
MC68HC16S2
16
MC68HC16S2TS/D
Figure 7 System Clock Filter Network
When the clock synthesizer is used, SYNCR determines the operating frequency of the MCU. The fol-
lowing equation relates the MCU operating frequency to the clock synthesizer reference frequency (fref)
and the W, X, and Y fields in SYNCR:
The W bit controls a prescaler tap in the feedback divider. Setting W increases VCO speed by a factor
of four. The Y field determines the count modulus for a modulo 64 downcounter, causing it to divide by
a value of Y+1. When W or Y changes, VCO frequency (fVCO) changes, and the VCO must relock.
The X bit controls a divide-by-two circuit that is not in the synthesizer feedback loop. When X=0 (reset
state), the divider is enabled, and the system clock is one-fourth the VCO frequency. Setting X=1
disables the divider, doubling the clock speed without changing the VCO frequency. There is no relock
delay when clock speed is changed by the X bit.
Internal VCO frequency is determined by the following equations:
or
For the MCU to operate correctly, system clock and VCO frequencies selected by the W, X, and Y bits
must be within the limits specified for the MCU. Do not use a combination of bit values that selects either
an operating frequency or a VCO frequency greater than the maximum specified values.
3.3.3 Clock Synthesizer Control
The clock synthesizer control circuits determine system clock frequency and clock operation under spe-
cial circumstances, such as following loss of synthesizer reference or during low-power operation. Clock
source is determined by the logic state of the MODCLK pin during reset.
NOTES:
1. Ensure that initialization software does not change the value of this bit (it should always be zero).
SYNCR — Clock Synthesizer Control Register
$YFFA04
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
W
X
Y
EDIV
0
RSVD1
SLOCK
RSVD1
STSIM
STEXT
RESET:
0
1
0
U
0
32 XFC CONN
* MAINTAIN LOW LEAKAGE ON THE XFC NODE.
0.01
F
0.1
F
XFC*
0.1
F
C4
C3
C1
VDDSYN
VSSI
f
sys
4f
ref Y1
+
() 2
2W
X
+
()
=
f
VCO
4f
sys if X = 0
=
f
VCO
2f
sys if X = 1
=
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC68HC16Z1CFV25 | 16-BIT, 25 MHz, MICROCONTROLLER, PQFP144 |
| MC68HC16Z1VFD25 | 16-BIT, 25 MHz, MICROCONTROLLER, PQFP132 |
| MC68HC16Z1VFC20 | 16-BIT, 20 MHz, MICROCONTROLLER, PQFP132 |
| MC68HC16Z1MFD16 | 16-BIT, 16.78 MHz, MICROCONTROLLER, PQFP132 |
| MC68HC16Z1MFV16 | 16-BIT, 16.78 MHz, MICROCONTROLLER, PQFP144 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC16Z1CAG | 制造商:Freescale Semiconductor 功能描述: |
| MC68HC16Z1CAG16 | 功能描述:16位微控制器 - MCU 16 BIT MCU 1K RAM RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT |
| MC68HC16Z1CAG16 | 制造商:Freescale Semiconductor 功能描述:IC16-BIT MICROCONTROLLER |
| MC68HC16Z1CAG20 | 功能描述:16位微控制器 - MCU 16 BIT MCU 1K RAM RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT |
| MC68HC16Z1CAG20 | 制造商:Freescale Semiconductor 功能描述:Microcontroller |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。