參數(shù)資料
型號： PIC16C505-04
廠商： Microchip Technology Inc.
元件分類： 8位微控制器
英文描述： 14-Pin, 8-Bit CMOS Microcontroller
中文描述： 14引腳，8位CMOS微控制器
文件頁數(shù)： 23/84頁
文件大?。?/td> 449K
代理商： PIC16C505-04
1998 Microchip Technology Inc.
Preliminary
DS40192B-page 23
PIC16C505
6.0
TIMER0 MODULE AND
TMR0 REGISTER
The Timer0 module has the following features:
8-bit timer/counter register, TMR0
- Readable and writable
8-bit software programmable prescaler
Internal or external clock select
- Edge select for external clock
Figure 6-1 is a simplified block diagram of the Timer0
module.
Timer mode is selected by clearing the T0CS bit
(OPTION<5>). In timer mode, the Timer0 module will
increment every instruction cycle (without prescaler). If
TMR0 register is written, the increment is inhibited for
the following two cycles (Figure 6-2 and Figure 6-3).
The user can work around this by writing an adjusted
value to the TMR0 register.
Counter mode is selected by setting the T0CS bit
(OPTION<5>). In this mode, Timer0 will increment
either on every rising or falling edge of pin T0CKI. The
T0SE bit (OPTION<4>) determines the source edge.
Clearing the T0SE bit selects the rising edge.
Restrictions on the external clock input are discussed
in detail in Section 6.1.
The prescaler may be used by either the Timer0
module or the Watchdog Timer, but not both. The
prescaler assignment is controlled in software by the
control bit PSA (OPTION<3>). Clearing the PSA bit
will assign the prescaler to Timer0. The prescaler is
not readable or writable. When the prescaler is
assigned to the Timer0 module, prescale values of 1:2,
1:4,..., 1:256 are selectable. Section 6.2 details the
operation of the prescaler.
A summary of registers associated with the Timer0
module is found in Table 6-1.
FIGURE 6-1:
TIMER0 BLOCK DIAGRAM
Note 1: Bits T0CS, T0SE, PSA, PS2, PS1 and PS0 are located in the OPTION register.
2: The prescaler is shared with the Watchdog Timer (Figure 6-5).
0
1
1
0
T0CS
(1)
F
OSC
/4
Programmable
Prescaler
(2)
Sync with
Internal
Clocks
TMR0 reg
PSout
Sync
(2 T
CY
delay)
PSout
Data bus
8
PSA
(1)
PS2, PS1, PS0
(1)
3
T0SE
RC5/T0CKI
Pin
相關PDF資料
PDF描述
PIC16C505 14-Pin, 8-Bit CMOS Microcontroller(每個I/O口有25mA驅(qū)動/吸收電流,12個I/O口，帶WDT的微控制器)
PIC16C54C EPROM/ROM-Based 8-Bit CMOS Microcontroller(18引腳、12個I/O端口、512位EPROM/ROM的8位CMOS微控制器)
PIC16C54 EPROM/ROM-Based 8-Bit CMOS Microcontroller Series(每個I/O口有20mA吸收,25mA驅(qū)動,12個I/O，2.5V的微控制器)
PIC16CR54B EPROM/ROM-Based 8-Bit CMOS Microcontroller Series(每個I/O口有20mA吸收,25mA驅(qū)動,12個I/O，2.5V的微控制器)
PIC16CR56A EPROM/ROM-Based 8-Bit CMOS Microcontroller Series(每個I/O有20mA吸收/25mA驅(qū)動,12個I/O，2.5V的微控制器)
相關代理商/技術參數(shù)
參數(shù)描述
PIC16C505-04/P 功能描述:8位微控制器 -MCU 1.5KB 72 RAM 12 I/O 4MHz PDIP14 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
PIC16C505-04/P 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU (TUBE 30) 16C505 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU 16C505 DIP14
PIC16C505-04/SL 功能描述:8位微控制器 -MCU 1.5KB 72 RAM 12 I/O 4MHz SOIC14 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
PIC16C505-04/SL 制造商:Microchip Technology Inc 功能描述:8BIT CMOS MCU SMD 16C505 SOIC14
PIC16C505-04E/P 功能描述:8位微控制器 -MCU 1.5KB 72 RAM 12 I/O 4MHz Ext Temp PDIP14 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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