參數(shù)資料
型號： PIC18F448-E/P
廠商： Microchip Technology
文件頁數(shù)： 39/116頁
文件大?。?/td> 0K
描述： IC MCU FLASH 8KX16 W/CAN 40-DIP
產(chǎn)品培訓模塊： Asynchronous Stimulus
標準包裝： 10
系列： PIC® 18F
核心處理器： PIC
芯體尺寸： 8-位
速度： 40MHz
連通性： CAN，I²C，SPI，UART/USART
外圍設備： 欠壓檢測/復位，LVD，POR，PWM，WDT
輸入/輸出數(shù)： 33
程序存儲器容量： 16KB（8K x 16）
程序存儲器類型： 閃存
EEPROM 大?。?/td> 256 x 8
RAM 容量： 768 x 8
電壓 - 電源 (Vcc/Vdd)： 4.2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 8x10b
振蕩器型： 外部
工作溫度： -40°C ~ 125°C
封裝/外殼： 40-DIP（0.600"，15.24mm）
包裝： 管件
2006 Microchip Technology Inc.
DS41159E-page 27
PIC18FXX8
3.7
Time-out Sequence
On power-up, the time-out sequence is as follows:
First, PWRT time-out is invoked after the POR time
delay has expired, then OST is activated. The total
time-out will vary based on oscillator configuration and
the status of the PWRT. For example, in RC mode with
the PWRT disabled, there will be no time-out at all.
Figure 3-7 depict time-out sequences on power-up.
Since the time-outs occur from the POR pulse, if MCLR
is kept low long enough, the time-outs will expire.
Bringing MCLR high will begin execution immediately
(Figure 3-5). This is useful for testing purposes or to
synchronize more than one
PIC18FXX8 device
operating in parallel.
Table 3-2 shows the Reset conditions for some Special
Function Registers, while Table 3-3 shows the Reset
conditions for all registers.
TABLE 3-1:
TIME-OUT IN VARIOUS SITUATIONS
REGISTER 3-1:
RCON REGISTER BITS AND POSITIONS
TABLE 3-2:
STATUS BITS, THEIR SIGNIFICANCE AND THE INITIALIZATION CONDITION FOR
RCON REGISTER
Oscillator
Configuration
Power-up(2)
Brown-out(2)
Wake-up from
Sleep or
Oscillator Switch
PWRTEN = 0
PWRTEN = 1
HS with PLL enabled(1) 72 ms + 1024 TOSC + 2 ms 1024 TOSC + 2 ms 72 ms + 1024 TOSC + 2 ms 1024 TOSC + 2 ms
HS, XT, LP
72 ms + 1024 TOSC
1024 TOSC
72 ms + 1024 TOSC
1024 TOSC
EC
72 ms
—
72 ms
—
External RC
72 ms
—
72 ms
—
Note 1:
2 ms = Nominal time required for the 4x PLL to lock.
2:
72 ms is the nominal Power-up Timer delay.
R/W-0
U-0
R/W-1
R/W-0
R/W-1
IPEN
—
—RI
TO
PD
POR
BOR
bit 7
bit 0
Condition
Program
Counter
RCON
Register
RI
TO
PD
POR
BOR
STKFUL
STKUNF
Power-on Reset
0000h
0--1 110q
1
0
u
MCLR Reset during normal
operation
0000h
0--0 011q
u
Software Reset during normal
operation
0000h
0--0 011q
0
u
Stack Full Reset during normal
operation
0000h
0--0 011q
u
1
u
1
Stack Underflow Reset during
normal operation
0000h
0--0 011q
u
1
u
MCLR Reset during Sleep
0000h
0--0 011q
u
1
0
u
WDT Reset
0000h
0--0 011q
u
0
1
u
WDT Wake-up
PC + 2
0--1 101q
u
0
u
Brown-out Reset
0000h
0--1 110q
1
u
0
u
Interrupt wake-up from Sleep
PC + 2(1)
0--1 101q
u
1
0
u
Legend: u = unchanged, x = unknown, - = unimplemented bit, read as ‘0’
Note 1:
When the wake-up is due to an interrupt and the GIEH or GIEL bits are set, the PC is loaded with the
interrupt vector (000008h or 000018h).
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC18F448-I/L 功能描述:8位微控制器 -MCU 16KB 768 RAM 34 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC18F448-I/L 制造商:Microchip Technology Inc 功能描述:IC 8BIT FLASH MCU CAN ADC 18F448
PIC18F448-I/P 功能描述:8位微控制器 -MCU 16KB 768 RAM 34 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC18F448-I/P 制造商:Microchip Technology Inc 功能描述:IC 8BIT FLASH MCU CAN ADC 18F448
PIC18F448-I/PT 功能描述:8位微控制器 -MCU 16KB 768 RAM 34 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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