參數(shù)資料
型號: PIC32MX795F512L-80I/PT
廠商: Microchip Technology
文件頁數(shù): 19/64頁
文件大?。?/td> 0K
描述: IC MCU 32BIT 512KB FLASH 100TQFP
特色產(chǎn)品: PIC32 32-Bit MCU Families
標準包裝: 119
系列: PIC® 32MX
核心處理器: MIPS32? M4K?
芯體尺寸: 32-位
速度: 80MHz
連通性: CAN,以太網(wǎng),I²C,SPI,UART/USART,USB OTG
外圍設(shè)備: 欠壓檢測/復位,DMA,POR,PWM,WDT
輸入/輸出數(shù): 85
程序存儲器容量: 512KB(512K x 8)
程序存儲器類型: 閃存
RAM 容量: 128K x 8
電壓 - 電源 (Vcc/Vdd): 2.3 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: 650 (CN2011-ZH PDF)
PIC32MX
DS61145K-page 26
2007-2012 Microchip Technology Inc.
12.0
DOWNLOADING A DATA
BLOCK
To program a block of data to the PIC32MX device, it
must first be loaded into SRAM.
12.1
Without the PE
To program a block of memory without the use of the
PE, the block of data must first be written to RAM. This
method requires the programmer to transfer the actual
machine instructions with embedded (immediate) data
for writing the block of data to the devices internal RAM
memory.
FIGURE 12-1:
DOWNLOADING DATA
WITHOUT THE PE
The following steps are required to download a block of
data:
1.
XferInstruction
(op code).
2.
Repeat Step 1 until the last instruction is
transferred to CPU.
TABLE 12-1:
DOWNLOAD DATA OP
CODES
12.2
With the PE
When using the PE the steps in Section 12.0 “Down-
Flash Row Write” are handled in two single commands:
ROW_PROGRAM
and PROGRAM.
The ROW_PROGRAM command programs a single row of
Flash data, while the PROGRAM command programs
multiple rows of Flash data. Both of these commands
bufAddr = RAM Buffer Address
Write 32-bit Immediate
Increment bufAddr
Done
No
Data to bufAddr
Op code
Instruction
Step 1: Initialize SRAM Base Address to
0xA000_0000
3c10a000
lui
$s0, 0xA000;
Step 2: Write the entire row of data to be
programmed into system SRAM.
3c08<DATA>
3508<DATA>
ae08<OFFSET>
lui
$t0, <DATA(31:16)>;
ori
$t0, <DATA(15:0)>;
sw
$t0, <OFFSET>($s0);
// OFFSET increments by 4
Step 3: Repeat Step 2 until one row of data has
been loaded.
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