PIC16F819 Datasheet

IC型号：
PIC16F819
PDF描述：
18/20-Pin Enhanced Flash Microcontrollers with nanoWatt Tech...
文件大小：
68.31KB
PDF页数：
176页
芯片厂家：
MICROCHIP

阅览下载纠错 0

扫码查看芯片数据手册

上传产品规格书

PDF预览

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164

PIC16F818/819

3.5

Reading Flash Program Memory

3.6

Erasing Flash Program Memory

To read a program memory location, the user must

write two bytes of the address to the EEADR and

EEADRH registers, set the EEPGD control bit

(EECON1<7>) and then set control bit, RD

(EECON1<0>). Once the read control bit is set, the

program memory Flash controller will use the second

instruction cycle to read the data. This causes the

second instruction immediately following the

鈥淏SF

EECON1, RD鈥?/div>

instruction to be ignored. The data

is available in the very next cycle in the EEDATA and

EEDATH registers; therefore, it can be read as two

bytes in the following instructions. EEDATA and

EEDATH registers will hold this value until another read

or until it is written to by the user (during a write

operation).

The minimum erase block is 32 words. Only through

the use of an external programmer, or through ICSP

control, can larger blocks of program memory be bulk

erased. Word erase in the Flash array is not supported.

When initiating an erase sequence from the micro-

controller itself, a block of 32 words of program memory

is erased. The Most Significant 11 bits of the

EEADRH:EEADR point to the block being erased.

EEADR< 4:0> are ignored.

The EECON1 register commands the erase operation.

The EEPGD bit must be set to point to the Flash pro-

gram memory. The WREN bit must be set to enable

write operations. The FREE bit is set to select an erase

operation.

For protection, the write initiate sequence for EECON2

must be used.

After the 鈥淏SF

EECON1, WR鈥?/div>

instruction, the processor

requires two cycles to set up the erase operation. The

user must place two

NOP

instructions after the WR bit is

set. The processor will halt internal operations for the

typical 2 ms, only during the cycle in which the erase

takes place. This is not Sleep mode, as the clocks and

peripherals will continue to run. After the erase cycle,

the processor will resume operation with the third

instruction after the EECON1 write instruction.

EXAMPLE 3-3:

BANKSEL EEADRH

MOVF

ADDRH, W

MOVWF

EEADRH

FLASH PROGRAM READ

Select Bank of EEADRH

MS Byte of Program

Address to read

LS Byte of Program

Address to read

Select Bank of EECON1

Point to PROGRAM

memory

EE Read

Any instructions

here are ignored as

program memory is

read in second cycle

after BSF EECON1,RD

Select Bank of EEDATA

DATAL = EEDATA

DATAH = EEDATH

;

MOVF

ADDRL, W

;

MOVWF

EEADR

;

BANKSEL EECON1

;

BSF

EECON1, EEPGD ;

;

BSF

EECON1, RD

;

NOP

;

NOP

;

BANKSEL EEDATA

;

MOVF

EEDATA, W

;

MOVWF

DATAL

;

MOVF

EEDATH, W

;

MOVWF

DATAH

;

3.6.1

FLASH PROGRAM MEMORY

ERASE SEQUENCE

The sequence of events for erasing a block of internal

program memory location is:

Load EEADRH:EEADR with address of row

being erased.

Set EEPGD bit to point to program memory; set

WREN bit to enable writes and set FREE bit to

enable the erase.

Disable interrupts.

Write 55h to EECON2.

Write AAh to EECON2.

Set the WR bit. This will begin the row erase

cycle.

The CPU will stall for duration of the erase.

DS39598D-page 28

Preliminary

铮?/div>

2003 Microchip Technology Inc.

prev next

PIC16F819 PDF文件相关型号

PIC16F83,PIC16F84,PIC16F85,PIC16F86

PIC16F819相关型号PDF文件下载

型号

版本

描述

厂商

下载
PIC12

英文版

8-Pin FLASH-Based 8-Bit CMOS Microcontrollers

PIC12
PIC12

英文版

8-Pin, 8-Bit CMOS Microcontroller with EEPROM Data Memory

MICROCHIP ...

PIC12
PIC12

英文版

8-Pin, 8-Bit CMOS Microcontroller with A/D Converter and EEP...

MICROCHIP ...

PIC12
PIC12

英文版

8-Pin, 8-Bit CMOS Microcontrollers

MICROCHIP ...

PIC12
PIC12

英文版

EPROM Memory Programming Specification

MICROCHIP ...

PIC12
PIC12

英文版

8-Pin FLASH-Based 8-Bit CMOS Microcontrollers

MICROCHIP ...

PIC12
PIC18

英文版

Microcontroller

PIC18
PIC10F

英文版

Microcontroller

PIC10F
PIC1657

英文版

Microcontroller

ETC

PIC1657
PIC16C5

英文版

EPROM-Based 8-Bit CMOS Microcontroller

PIC16C5
PIC12C50

英文版

8-Pin, 8-Bit CMOS Microcontrollers

PIC12C50
PIC12C50

英文版

8-Pin, 8-Bit CMOS Microcontrollers

MICROCHIP ...

PIC12C50
PIC12C5X

英文版

ETC

PIC12C5X
PIC12C67

英文版

EPROM Memory Programming Specification

PIC12C67
PIC12C67

英文版

EPROM Memory Programming Specification

MICROCHIP ...

PIC12C67
PIC14000

英文版

28-Pin Programmable Mixed Signal Controller

PIC14000
PIC14000

英文版

EPROM Memory Programming Specification

PIC14000
PIC1657I

英文版

Microcontroller

ETC

PIC1657I
PIC1657M

英文版

Microcontroller

ETC

PIC1657M
PIC16C52

英文版

EPROM/ROM-Based 8-Bit CMOS Microcontroller Series

PIC16C52

PIC16F819 Datasheet

PDF预览

PIC16F819 PDF文件相关型号

PIC16F819相关型号PDF文件下载

您可能感兴趣的PDF文件资料

热门IC型号推荐

PIC16F819 Datasheet

PDF预览

PIC16F819 PDF文件相关型号

PIC16F819相关型号PDF文件下载

您可能感兴趣的PDF文件资料

热门IC型号推荐

建议反馈

PDF纠错X