參數(shù)資料
型號(hào): PIC14000-04/SO
廠商: Microchip Technology
文件頁(yè)數(shù): 142/153頁(yè)
文件大?。?/td> 0K
描述: IC MCU OTP 4KX14 A/D 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® 14
核心處理器: PIC
芯體尺寸: 8-位
速度: 4MHz
連通性: I²C
外圍設(shè)備: POR,溫度傳感器,WDT
輸入/輸出數(shù): 20
程序存儲(chǔ)器容量: 7KB(4K x 14)
程序存儲(chǔ)器類型: OTP
RAM 容量: 192 x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 6 V
數(shù)據(jù)轉(zhuǎn)換器: 斜率 A/D
振蕩器型: 內(nèi)部
工作溫度: 0°C ~ 70°C
封裝/外殼: 28-SOIC(0.295",7.50mm 寬)
包裝: 管件
配用: ISPICR1-ND - ADAPTER IN-CIRCUIT PROGRAMMING
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
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1996 Microchip Technology Inc.
Preliminary
DS40122B-page 89
PIC14000
FIGURE 10-13: WAKE-UP FROM SLEEP AND HIBERNATE THROUGH INTERRUPT
Note
1:
HS oscillator mode assumed.
2:
TOST = 1024 TOSC (drawing not to scale). This delay will be 8 TOSC for IN osc mode.
3:
GIE = 1 assumed. In this case after wake up processor jumps to interrupt routine. If GIE = 0, execution will continue in line.
4:
CLKOUT is not available in these osc modes, but shown here for timing reference.
5:
Refer to Section 10.8 for sources.
Q1 Q2 Q3 Q4
Q1
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
OSC1
CLKOUT(4)
INTERRUPT
GIE bit
(INTCON<7>)
INSTRUCTION FLOW
PC
Instruction
fetched
Instruction
executed
PC
PC+1
PC+2
Inst(PC) = SLEEP
Inst(PC - 1)
Inst(PC + 1)
SLEEP
Processor in
SLEEP
Interrupt Latency
(Note 2)
Inst(PC + 2)
Inst(PC + 1)
Inst(0004h)
Inst(0005h)
Inst(0004h)
Dummy cycle
PC + 2
0004h
0005h
Dummy cycle
TOST(2)
Flag (5)
10.9
Code Protection
The code in the program memory can be protected by
programming the code protect bits. When code
protected, the contents of the program memory cannot
be read out. In code-protected mode, the conguration
word (2007h) will not be scrambled, allowing reading of
all conguration bits.
10.10
In-Circuit Serial Programming
PIC14000 can be serially programmed while in the end
application circuit. This is simply done with two lines for
clock and data, and three other lines for power, ground
and the programming voltage. This allows customers to
manufacture boards with unprogrammed devices, and
then program the microcontroller just before shipping
the product. This allows the most recent rmware or a
custom rmware to be programmed.
The device is placed into a program/verify mode by
holding the RC6/SCL and RC7/SDA pins low while
raising the MCLR (VPP) pin from VIL to VIH. RC6 then
becomes the programming clock and RC7 becomes
the programmed data. Both RC6 and RC7 are Schmitt
trigger inputs in this mode.
After reset, to place the device into programming/verify
mode, the program counter (PC) is at location 00h. A
6-bit command is then supplied to the device.
Depending on the command, 14-bits of program data
are then supplied to or from the device. For complete
details about serial programming, please refer to the
PIC16C6X/7X Programming Specications (Literature
#DS30228).
A typical in-system serial programming connection is
shown in Figure 10-14.
FIGURE 10-14: TYPICAL IN-SYSTEM SERIAL
PROGRAMMING
CONNECTION
External
Connector
Signals
To Normal
Connections
To Normal
Connections
PIC14000
VDD
VSS
MCLR/VPP
RC6
RC7
+5V
0V
Vpp
CLK
Data I/O
VDD
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