전자부품 데이터시트 검색엔진
  Korean  ▼
ALLDATASHEET.CO.KR

X  

Preview PDF HTML

PIC24F04KA201 데이터시트(PDF) 24 Page - Microchip Technology

부품명 PIC24F04KA201
상세설명  Flash Programming Specifications
PDF  48 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC24F04KA201 데이터시트(HTML) 24 Page - Microchip Technology

Back Button PIC24F04KA201 Datasheet HTML 20Page - Microchip Technology PIC24F04KA201 Datasheet HTML 21Page - Microchip Technology PIC24F04KA201 Datasheet HTML 22Page - Microchip Technology PIC24F04KA201 Datasheet HTML 23Page - Microchip Technology PIC24F04KA201 Datasheet HTML 24Page - Microchip Technology PIC24F04KA201 Datasheet HTML 25Page - Microchip Technology PIC24F04KA201 Datasheet HTML 26Page - Microchip Technology PIC24F04KA201 Datasheet HTML 27Page - Microchip Technology PIC24F04KA201 Datasheet HTML 28Page - Microchip Technology Next Button
Zoom Inzoom in Zoom Outzoom out
 24 / 48 page
background image
PIC24FXXKAXXX
DS39919A-page 24
Advance Information
© 2008 Microchip Technology Inc.
4.2
Confirming the Presence of the
Programming Executive
Before
beginning
programming,
confirm
if
the
programming executive is stored in the executive
memory and perform the following:
1.
Enter In-Circuit Serial Programming mode
(ICSP).
2.
Read the unique Application ID Word stored in
the executive memory.
Figure 4-2 illustrates this procedure.
If
the
programming
executive
is
resident,
the
Application
ID
Word
is
BBh,
which
means
programming can resume as normal. However, if the
Application ID Word is not BBh, the programming
executive must be programmed to executive code
memory using the method described in Section 5.4
“Programming the Programming Executive to
Memory”.
Section 3.0 “Device Programming – ICSP” describes
the ICSP programming method. Section 3.13 “Reading
the Application ID Word” describes the procedure for
reading the Application ID Word in ICSP mode.
FIGURE 4-2:
CONFIRMING PRESENCE
OF PROGRAMMING
EXECUTIVE
4.3
Entering Enhanced ICSP Mode
4.3.1
LOW-VOLTAGE ENTRY
Perform the following steps to enter Enhanced ICSP
Program/Verify mode using MCLR:
1.
Briefly drive the MCLR pin high, and then low.
2.
Clock a 32-bit key sequence into PGDx.
3.
Drive the MCLR high within a specified period
and continue to hold high.
Figure 4-3 illustrates this procedure.
The programming voltage applied to MCLR is VIH,
which
is
essentially
VDD
in
the
case
of
PIC24FXXKAXXX devices. There is no minimum time
requirement for holding at VIH. After VIH is removed, an
interval of at least P18 must elapse before presenting
the key sequence on PGDx.
The key sequence is a specific 32-bit pattern:
‘0100
1101
0100
0011
0100
1000
0101
0000
‘ (more easily remembered as 4D434850h in
hexadecimal
format).
The
device
will
enter
Program/Verify mode only if the key sequence is valid.
The MSB of the most significant nibble must be shifted
in first.
Once the key sequence is complete, VIH must be
applied to MCLR and held at that level for as long as
the Program/Verify mode is to be maintained. An
interval of at least P19 and P7 must elapse before
presenting data on PGDx. Signals appearing on PGDx
before P7 has elapsed will not be interpreted as valid.
4.3.2
HIGH-VOLTAGE ENTRY
The
procedure
for
entering
Enhanced
ICSP
Program/Verify mode using the VPP pin is the same as
entering the mode using MCLR. The only differences
are that the programming voltage applied to VPP is
VIHH, and before presenting the key sequence on
PGDx, an interval of at least P18 should elapse.
Figure 4-4 illustrates this procedure.
Once the key sequence is complete, an interval of at
least P19 should elapse and the VIHH should be
reduced to VIH. The voltage, VIH, must be applied to
VPP and held at that level for as long as the
Program/Verify mode is to be maintained. An interval of
at least P19 and P7 should elapse before presenting
data on PGDx.
Signals appearing on PGDx before P7 has elapsed will
not be interpreted as valid.
On successful entry, the program memory can be
accessed and programmed in serial fashion. While in
the Program/Verify mode, all unused I/Os are placed in
the high-impedance state.
Is
Start
Enter ICSP™ Mode
Application ID
BBh?
Resident in Memory
Yes
No
Prog. Executive is
Application ID
Read the
be Programmed
Prog. Executive must
from Address
805BEh
Finish



Html Pages

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


데이터시트 다운로드

Go To PDF Page


링크 URL



ALLDATASHEET 가 귀하에 도움이 되셨나요?  [ DONATE ] 

Alldatasheet는?   |   광고문의   |   운영자에게 연락하기   |   개인정보취급방침   |   링크 투 데이터시트    |   링크교환   |   제조사별 검색
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com