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| 型號(hào)： | PIC10F202T |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 6-Pin, 8-Bit Flash Microcontrollers |
| 中文描述： | 6引腳，8位閃存微控制器 |
| 文件頁(yè)數(shù)： | 31/86頁(yè) |
| 文件大?。?/td> | 620K |
| 代理商： | PIC10F202T |
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2005 Microchip Technology Inc.
Preliminary
DS41239B-page 29
PIC10F200/202/204/206
6.0
TIMER0 MODULE AND TMR0
REGISTER (PIC10F200/202)
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. Restric-
tions on the external clock input are discussed in detail
in
Section 6.1 “Using Timer0 with an External Clock
(PIC10F200/202)”
.
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 “Prescaler”
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
FIGURE 6-2:
TIMER0 TIMING: INTERNAL CLOCK/NO PRESCALE
Note 1:
Bits T0CS, T0SE, PSA, PS2, PS1 and PS0 are located in the OPTION register.
The prescaler is shared with the Watchdog Timer (Figure 6-5).
2:
0
1
1
0
T0CS
(1)
F
OSC
/4
Programmable
Prescaler
(2)
Sync with
Internal
Clocks
TMR0 Reg
PS
OUT
Sync
(2 T
CY
delay)
PS
OUT
Data Bus
8
PSA
(1)
PS2, PS1, PS0
(1)
3
T0SE
GP2/T0CKI
Pin
PC – 1
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Q1 Q2 Q3 Q4
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Instruction
Fetch
Timer0
PC
PC + 1
PC + 2
PC + 3
PC + 4
PC + 6
T0
T0 + 1
T0 + 2
NT0
NT0 + 1
NT0 + 2
MOVWF TMR0
MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W
MOVF TMR0,W
Write TMR0
executed
Read TMR0
reads NT0
Read TMR0
reads NT0
Read TMR0
reads NT0
Read TMR0
reads NT0 + 1
Read TMR0
reads NT0 + 2
Instruction
Executed
PC + 5
PC
(Program
Counter)
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| PIC10F200 | 6-Pin, 8-Bit Flash Microcontrollers |
| PIC10F200T | 6-Pin, 8-Bit Flash Microcontrollers |
| PIC10F202 | 6-Pin, 8-Bit Flash Microcontrollers |
| PIC10F204 | 6-Pin, 8-Bit Flash Microcontrollers |
| PIC10F204T | 6-Pin, 8-Bit Flash Microcontrollers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PIC10F202T-E/MC | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:6-Pin, 8-Bit Flash Microcontrollers |
| PIC10F202T-E/OT | 功能描述:8位微控制器 -MCU .75kBF 24RM 4I/O Ext Temp SOT-23 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT |
| PIC10F202T-E/P | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:6-Pin, 8-Bit Flash Microcontrollers |
| PIC10F202T-I/MC | 功能描述:8位微控制器 -MCU 0.75KB Fl 24B RAM 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT |
| PIC10F202T-I/OT | 功能描述:8位微控制器 -MCU .75kBF 24RM 4I/O Ind Temp SOT-23 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT |
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