參數(shù)資料
型號(hào): PIC16C62B-04/SO
廠商: Microchip Technology
文件頁數(shù): 40/120頁
文件大?。?/td> 0K
描述: IC MCU OTP 2KX14 PWM 28SOIC
產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標(biāo)準(zhǔn)包裝: 27
系列: PIC® 16C
核心處理器: PIC
芯體尺寸: 8-位
速度: 4MHz
連通性: I²C,SPI
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 22
程序存儲(chǔ)器容量: 3.5KB(2K x 14)
程序存儲(chǔ)器類型: OTP
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 4 V ~ 5.5 V
振蕩器型: 外部
工作溫度: 0°C ~ 70°C
封裝/外殼: 28-SOIC(0.295",7.50mm 寬)
包裝: 管件
產(chǎn)品目錄頁面: 636 (CN2011-ZH PDF)
配用: XLT28SO-1-ND - SOCKET TRANSITION 28SOIC 300MIL
309-1073-ND - ADAPTER 28-SOIC TO 28-SOIC
309-1024-ND - ADAPTER 28-SOIC TO 28-DIP
309-1023-ND - ADAPTER 28-SOIC TO 28-DIP
PIC16C62B/72A
DS35008B-page 26
Preliminary
1999 Microchip Technology Inc.
4.2.1
SWITCHING PRESCALER ASSIGNMENT
The prescaler assignment is fully under software con-
trol, (i.e., it can be changed “on-the-fly” during program
execution).
4.3
Timer0 Interrupt
The TMR0 interrupt is generated when the TMR0 reg-
ister overflows from FFh to 00h. This overflow sets bit
T0IF (INTCON<2>). The interrupt can be masked by
clearing bit T0IE (INTCON<5>). Bit T0IF must be
cleared in software by the Timer0 module interrupt ser-
vice routine before re-enabling this interrupt. The
TMR0 interrupt cannot awaken the processor from
SLEEP since the timer is shut off during SLEEP.
FIGURE 4-2:
BLOCK DIAGRAM OF THE TIMER0/WDT PRESCALER
TABLE 4-1
REGISTERS ASSOCIATED WITH TIMER0
Note:
To avoid an unintended device RESET, a
specific instruction sequence (shown in the
PICmicro Mid-Range Reference Man-
ual, DS33023) must be executed when
changing the prescaler assignment from
Timer0 to the WDT. This sequence must
be followed even if the WDT is disabled.
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on:
POR,
BOR
Value on all
other resets
01h
TMR0
Timer0 module’s register
xxxx xxxx
uuuu uuuu
0Bh,8Bh
INTCON
GIE
PEIE
T0IE
INTE
RBIE
T0IF
INTF
RBIF
0000 000x
0000 000u
81h
OPTION_REG
RBPU
INTEDG
T0CS
T0SE
PSA
PS2
PS1
PS0
1111 1111
85h
TRISA
PORTA Data Direction Register
--11 1111
Legend: x = unknown, u = unchanged, - = unimplemented locations read as '0'. Shaded cells are not used by Timer0.
RA4/T0CKI
T0SE
pin
M
U
X
CLKOUT (= Fosc/4)
SYNC
2
TCY
TMR0 reg
8-bit Prescaler
8 - to - 1MUX
M
U
X
M U X
Watchdog
Timer
PSA
0
1
0
1
WDT
Time-out
PS2:PS0
8
Note: T0CS, T0SE, PSA, PS2:PS0 are (OPTION_REG<5:0>).
PSA
WDT Enable bit
M
U
X
0
1
0
1
Data Bus
Set flag bit T0IF
on Overflow
8
PSA
T0CS
Prescaler
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