參數(shù)資料
型號： XC888LM
廠商： INFINEON TECHNOLOGIES AG
元件分類： 8位微控制器
英文描述： 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
中文描述： 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存
文件頁數(shù)： 65/119頁
文件大?。?/td> 895K
代理商： XC888LM
XC886/888CLM
Functional Description
Data Sheet
Prelimary
61
V0.1, 2006-02
3.7
Reset Control
The XC886/888 has five types of reset: power-on reset, hardware reset, watchdog timer
reset, power-down wake-up reset, and brownout reset.
When the XC886/888 is first powered up, the status of certain pins (see
Table 23
) must
be defined to ensure proper start operation of the device. At the end of a reset sequence,
the sampled values are latched to select the desired boot option, which cannot be
modified until the next power-on reset or hardware reset. This guarantees stable
conditions during the normal operation of the device.
In order to power up the system properly, the external reset pin RESET must be asserted
until V
DDC
reaches 0.9*V
DDC
. The delay of external reset can be realized by an external
capacitor at RESET pin. This capacitor value must be selected so that V
RESET
reaches
0.4 V, but not before V
DDC
reaches 0.9* V
DDC.
A typical application example is shown in
Figure 23
. For a voltage regulator with IDD
max
= 100 mA, the V
DDP
capacitor value is 10
μ
F. V
DDC
capacitor value is 220 nF. The
capacitor connected to RESET pin is 100 nF.
Typically, the time taken for V
DDC
to reach 0.9*V
DDC
is less than 50
μ
s once V
DDP
reaches 2.3V. Hence, based on the condition that 10% to 90% V
DDP
(slew rate) is less
than 500
μ
s, the RESET pin should be held low for 500
μ
s typically. See
Figure 24
.
Figure 23
Reset Circuitry
VSSP
VDDP
VDDC
VSSC
3 - 5V /
e.g. 100mA
RESET
EVR
VR
Vin
e.g. 10uF
220nF
typ.
100nF
XC886/888
30k
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XC888LM6FFA5VACKXUMA1 制造商:Infineon Technologies AG 功能描述:MCU 8-bit XC800 8051 CISC 24KB Flash 2.5V/5V 64-Pin TQFP 制造商:Infineon Technologies AG 功能描述:8 BIT FLASH - Tape and Reel 制造商:Infineon Technologies AG 功能描述:IC MCU 8BIT FLASH 64-LQFP
XC888LM6FFI3V3ACFXUMA1 制造商:Infineon Technologies AG 功能描述:MCU 8-BIT XC800 8051 CISC 24KB FLASH 2.5V/3.3V 64-PIN TQFP 制造商:Infineon Technologies AG 功能描述:8 BIT FLASH - Tape and Reel 制造商:Infineon Technologies AG 功能描述:IC MCU 8BIT 32KB FLASH 64TQFP
XC888LM8FFI5VACFXUMA1 制造商:Infineon Technologies AG 功能描述:MCU 8-BIT XC800 8051 CISC 32KB FLASH 2.5V/5V 64-PIN TQFP 制造商:Infineon Technologies AG 功能描述:8 BIT FLASH - Tape and Reel 制造商:Infineon Technologies AG 功能描述:IC MCU 8BIT FLASH 64-LQFP
XC88915TFN100 制造商:Motorola Inc 功能描述:
XC88916DW55 制造商:Motorola Inc 功能描述:
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