参数资料
型号: PIC18LF4321T-I/PT
厂商: Microchip Technology
文件页数: 86/110页
文件大小: 0K
描述: IC PIC MCU FLASH 4KX16 44TQFP
产品培训模块: Asynchronous Stimulus
标准包装: 1,200
系列: PIC® 18F
核心处理器: PIC
芯体尺寸: 8-位
速度: 40MHz
连通性: I²C,SPI,UART/USART
外围设备: 欠压检测/复位,HLVD,POR,PWM,WDT
输入/输出数: 36
程序存储器容量: 8KB(4K x 16)
程序存储器类型: 闪存
EEPROM 大小: 256 x 8
RAM 容量: 512 x 8
电压 - 电源 (Vcc/Vdd): 2 V ~ 5.5 V
数据转换器: A/D 13x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 44-TQFP
包装: 带卷 (TR)
2009 Microchip Technology Inc.
DS39689F-page 77
PIC18F2221/2321/4221/4321 FAMILY
6.5.3
MAPPING THE ACCESS BANK IN
INDEXED LITERAL OFFSET
ADDRESSING MODE
The use of Indexed Literal Offset Addressing mode
effectively changes how the first 96 locations of Access
RAM (00h to 5Fh) are mapped. Rather than containing
just the contents of the bottom half of Bank 0, this mode
maps the contents from Bank 0 and a user-defined
“window” that can be located anywhere in the data
memory space. The value of FSR2 establishes the
lower boundary of the addresses mapped into the
window, while the upper boundary is defined by FSR2
plus 95 (5Fh). Addresses in the Access RAM above
5Fh are mapped as previously described (see
Section 6.3.2 “Access Bank”). An example of Access
Bank remapping in this addressing mode is shown in
Remapping of the Access Bank applies only to opera-
tions using the Indexed Literal Offset Addressing
mode. Operations that use the BSR (Access RAM bit is
‘1’) will continue to use direct addressing as before.
6.6
PIC18 Instruction Execution and
the Extended Instruction Set
Enabling the extended instruction set adds eight
additional commands to the existing PIC18 instruction
set. These instructions are executed as described in
FIGURE 6-9:
REMAPPING THE ACCESS BANK WITH INDEXED LITERAL OFFSET
ADDRESSING MODE
Data Memory
000h
100h
200h
F80h
F00h
FFFh
Bank 1
Bank 15
Bank 2
through
Bank 14
SFRs
05Fh
ADDWF f, d, a
FSR2H:FSR2L = 120h
Locations in the region
from the FSR2 Pointer
(120h) to the pointer plus
05Fh (17Fh) are mapped
to the bottom of the
Access RAM (000h-05Fh).
Locations in Bank 0, from
060h to 07Fh, are mapped
as usual to the middle of
the Access Bank.
Special Function Regis-
ters at F80h through FFFh
are
mapped
to
80h
through FFh, as usual.
Bank 0 addresses below
5Fh can still be addressed
by using the BSR.
Access Bank
00h
80h
FFh
7Fh
Bank 0
SFRs
Bank 1 “Window”
Bank 0
Bank 0
Window
Example Situation:
07Fh
120h
17Fh
5Fh
Bank 1
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PIC18LF4331-I/ML 功能描述:8位微控制器 -MCU 8KB 768 RAM 34I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18LF4331-I/P 功能描述:8位微控制器 -MCU 8KB 768 RAM 34I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18LF4331-I/PT 功能描述:8位微控制器 -MCU 8KB 768 RAM 34I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18LF4331T-I/ML 功能描述:8位微控制器 -MCU 8KB 768 RAM 34I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18LF4331T-I/PT 功能描述:8位微控制器 -MCU 8KB 768 RAM 34I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT