參數(shù)資料
型號(hào): PIC24FJ64GA010-I/PF
廠商: Microchip Technology
文件頁數(shù): 207/258頁
文件大小: 0K
描述: IC PIC MCU FLASH 64KB 100TQFP
產(chǎn)品培訓(xùn)模塊: PIC24 Introduction
Graphics LCD System and PIC24 Interface
Asynchronous Stimulus
特色產(chǎn)品: PIC24FJ/33FJ MCUs & dsPIC? DSCs
標(biāo)準(zhǔn)包裝: 90
系列: PIC® 24F
核心處理器: PIC
芯體尺寸: 16-位
速度: 16MHz
連通性: I²C,PMP,SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 84
程序存儲(chǔ)器容量: 64KB(22K x 24)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 8K x 8
電壓 - 電源 (Vcc/Vdd): 2 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 16x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 100-TQFP
包裝: 托盤
產(chǎn)品目錄頁面: 647 (CN2011-ZH PDF)
配用: 876-1004-ND - PIC24 BREAKOUT BOARD
DM240011-ND - KIT STARTER MPLAB FOR PIC24F MCU
DV164033-ND - KIT START EXPLORER 16 MPLAB ICD2
MA160011-ND - DAUGHTER BOARD PICDEM LCD 16F91X
DM240001-ND - BOARD DEMO PIC24/DSPIC33/PIC32
AC164323-ND - MODULE SKT FOR 100TQFP
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PIC24FJ128GA010 FAMILY
DS39747F-page 52
2005-2012 Microchip Technology Inc.
5.2
RTSP Operation
The PIC24F Flash program memory array is organized
into rows of 64 instructions or 192 bytes. RTSP allows
the user to erase blocks of eight rows (512 instructions)
at a time and to program one row at a time. It is also
possible to program single words.
The 8-row erase blocks and single row write blocks are
edge-aligned, from the beginning of program memory,
on boundaries of 1536 bytes and 192 bytes,
respectively.
When data is written to program memory using TBLWT
instructions, the data is not written directly to memory.
Instead, data written using table writes is stored in
holding latches until the programming sequence is
executed.
Any number of TBLWT instructions can be executed
and a write will be successfully performed. However,
64 TBLWT instructions are required to write the full row
of memory.
To ensure that no data is corrupted during a write, any
unused addresses should be programmed with
FFFFFFh. This is because the holding latches reset to
an unknown state, so if the addresses are left in the
Reset state, they may overwrite the locations on rows
which were not rewritten.
The basic sequence for RTSP programming is to set up
a Table Pointer, then do a series of TBLWT instructions
to load the buffers. Programming is performed by
setting the control bits in the NVMCON register.
Data can be loaded in any order and the holding regis-
ters can be written to multiple times before performing
a write operation. Subsequent writes, however, will
wipe out any previous writes.
All of the table write operations are single-word writes
(2 instruction cycles), because only the buffers are
written. A programming cycle is required for
programming each row.
5.3
JTAG Operation
The PIC24F family supports JTAG programming and
boundary scan. Boundary scan can improve the manu-
facturing process by verifying pin to PCB connectivity.
Programming can be performed with industry standard
JTAG programmers supporting Serial Vector Format
(SVF).
5.4
Enhanced In-Circuit Serial
Programming
Enhanced In-Circuit Serial Programming uses an on-
board bootloader, known as the program executive, to
manage the programming process. Using an SPI data
frame format, the program executive can erase,
program and verify program memory. See the device
programming specification for more information on
Enhanced ICSP
5.5
Control Registers
There are two SFRs used to read and write the
program Flash memory: NVMCON and NVMKEY.
The NVMCON register (Register 5-1) controls which
blocks are to be erased, which memory type is to be
programmed and the start of the programming cycle.
NVMKEY is a write-only register that is used for write
protection. To start a programming or erase sequence,
the user must consecutively write 55h and AAh to the
NVMKEY register. Refer to Section 5.6 “Programming
for further details.
5.6
Programming Operations
A complete programming sequence is necessary for
programming or erasing the internal Flash in RTSP
mode. During a programming or an erase operation,
the processor stalls (Waits) until the operation is
finished. Setting the WR bit (NVMCON<15>) starts the
operation and the WR bit is automatically cleared when
the operation is finished.
Configuration Word values are stored in the last two
locations of program memory. Performing a page erase
operation on the last page of program memory clears
these values and enables code protection. As a result,
avoid performing page erase operations on the last
page of program memory.
Note:
Writing to a location multiple times without
erasing is not recommended.
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