參數(shù)資料
型號: PIC16F707-I/MV
廠商: Microchip Technology
文件頁數(shù): 88/123頁
文件大?。?/td> 0K
描述: MCU PIC 14KB FLASH 40-UQFN
產(chǎn)品培訓模塊: 8-bit PIC® Microcontroller Portfolio
特色產(chǎn)品: Extreme Low Power (XLP) Microcontrollers
標準包裝: 73
系列: PIC® XLP™ mTouch™ 16F
核心處理器: PIC
芯體尺寸: 8-位
速度: 20MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 36
程序存儲器容量: 14KB(8K x 14)
程序存儲器類型: 閃存
RAM 容量: 363 x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 14x8b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 40-UFQFN 裸露焊盤
包裝: 管件
2010 Microchip Technology Inc.
DS39616D-page 67
PIC18F2331/2431/4331/4431
6.5
Data Memory Organization
The data memory in PIC18 devices is implemented as
static RAM. Each register in the data memory has a 12-bit
address, allowing up to 4,096 bytes of data memory. The
memory space is divided into as many as 16 banks that
contain 256 bytes each. PIC18F2331/2431/4331/4431
devices implement all 16 banks.
Figure 6-6 shows the data memory organization for the
PIC18F2331/2431/4331/4431 devices. The data mem-
ory contains Special Function Registers (SFRs) and
General Purpose Registers (GPRs). The SFRs are used
for control and status of the controller and peripheral
functions, while GPRs are used for data storage and
scratchpad operations in the user’s application. Any
read of an unimplemented location will read as ‘0’s.
The instruction set and architecture allow operations
across all banks. The entire data memory may be
accessed by Direct, Indirect or Indexed Addressing
modes. Addressing modes are discussed later in this
subsection.
To ensure that commonly used registers (SFRs and
select GPRs) can be accessed in a single cycle, PIC18
devices implement an Access Bank. This is a 256-byte
memory space that provides fast access to SFRs and
the lower portion of GPR Bank 0 without using the
detailed description of the Access RAM.
FIGURE 6-6:
DATA MEMORY MAP FOR PIC18F2331/2431/4331/4431 DEVICES
Bank 0
Bank 1
Bank 14
Bank 15
Data Memory Map
BSR<3:0>
= 0000
= 0001
= 1111
060h
05Fh
F60h
FFFh
00h
5Fh
60h
FFh
Access Bank
When a = 0:
The BSR is ignored and the
Access Bank is used.
The first 96 bytes are
General Purpose RAM
(from Bank 0).
The second 160 bytes are
Special Function Registers
(from Bank 15).
When a = 1:
The BSR specifies the bank
used by the instruction.
F5Fh
F00h
EFFh
1FFh
100h
0FFh
000h
Access RAM
FFh
00h
FFh
00h
FFh
00h
GPR
SFR
Unused
Access RAM High
Access RAM Low
Bank 3
to
200h
Unused
Read ‘00h’
= 1110
= 0011
(SFRs)
= 0010
GPR
FFh
00h
Bank 2
300h
2FFh
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