- 您现在的位置：买卖IC网 > PDF目录365737 > SST89E516RD2-33-C-NI (Silicon Storage Technology, Inc.) FlashFlex51 MCU PDF资料下载
参数资料
| 型号： | SST89E516RD2-33-C-NI |
| 厂商： | Silicon Storage Technology, Inc. |
| 英文描述： | FlashFlex51 MCU |
| 中文描述： | FlashFlex51单片机 |
| 文件页数： | 67/91页 |
| 文件大小： | 984K |
| 代理商： | SST89E516RD2-33-C-NI |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页当前第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页
Preliminary Specifications
FlashFlex51 MCU
SST89E52RD2 / SST89E54RD2 / SST89E58RD2 / SST89E516RD2
SST89V52RD2 / SST89V54RD2 / SST89V58RD2 / SST89V516RD2
67
2004 Silicon Storage Technology, Inc.
S71255-00-000
3/04
13.0 SYSTEM CLOCK AND CLOCK OPTIONS
13.1 Clock Input Options and Recom-
mended Capacitor Values for Oscillator
Shown in Figure 13-1 are the input and output of an inter-
nal inverting amplifier (XTAL1, XTAL2), which can be con-
figured for use as an on-chip oscillator.
When driving the device from an external clock source,
XTAL2 should be left disconnected and XTAL1 should be
driven.
At start-up, the external oscillator may encounter a higher
capacitive load at XTAL1 due to interaction between the
amplifier and its feedback capacitance. However, the
capacitance will not exceed 15 pF once the external signal
meets the V
IL
and V
IH
specifications.
Crystal manufacturer, supply voltage, and other factors
may cause circuit performance to differ from one applica-
tion to another. C1 and C2 should be adjusted appropri-
ately for each design. Table 13-1, shows the typical values
for C1 and C2 vs. crystal type for various frequencies
More specific information about on-chip oscillator design
can be found in the FlashFlex51 Oscillator Circuit Design
Considerationsapplication note.
13.2 Clock Doubling Option
By default, the device runs at 12 clocks per machine cycle
(x1 mode). The device has a clock doubling option to
speed up to 6 clocks per machine cycle. Please refer to
Table 13-2 for detail.
Clock double mode can be enabled either via the external
host mode or the IAP mode. Please refer to Table 4-1 for
the external host mode enabling command and to Table 4-
6 and Table 4-7 for the IAP mode enabling commands
(When set, the EDC# bit in SFST register will indicate 6
clock mode.).
The clock double mode is only for doubling the inter-
nal system clock and the internal flash memory, i.e.
EA#=1.
To access the external memory and the peripheral
devices, careful consideration must be taken. Also note
that the crystal output (XTAL2) will not be doubled.
FIGURE
13-1: O
SCILLATOR
C
HARACTERISTICS
TABLE
13-1:R
ECOMMENDED
V
ALUES
FOR
C1
AND
C2
BY
C
RYSTAL
T
YPE
Crystal
Quartz
Ceramic
C1 = C2
20-30pF
40-50pF
T13-1.0 1255
TABLE
13-2: C
LOCK
D
OUBLING
F
EATURES
Device
Standard Mode (x1)
Clock Double Mode (x2)
Clocks per
Machine Cycle
12
12
Max. External Clock Frequency
(MHz)
40
33
Clocks per
Machine Cycle
6
6
Max. External Clock Frequency
(MHz)
20
16
SST89E5xxRD2
SST89V5xxRD2
T13-2.0 1255
1255 F32.0
XTAL2
XTAL1
V
SS
C1
Using the On-Chip Oscillator
External Clock Drive
C2
XTAL2
XTAL1
V
SS
External
Oscillator
Signal
NC
相关PDF资料 |
PDF描述 |
|---|---|
| SST89E516RD2-33-C-NJ | FlashFlex51 MCU |
| SST89E516RD2-33-C-PI | FlashFlex51 MCU |
| SST89E516RD2-33-C-PJ | FlashFlex51 MCU |
| SST89V58RD2-40-I-PJ | FlashFlex51 MCU |
| SST89V58RD2-40-I-TQI | FlashFlex51 MCU |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SST89E516RD2-33-C-NJ | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89E516RD2-33-C-PI | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89E516RD2-33-C-PJ | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89E516RD2-33-C-TQI | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89E516RD2-33-C-TQJ | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
发布紧急采购，3分钟左右您将得到回复。