最新免费av在线观看,亚洲综合一区成人在线,中文字幕精品无码一区二区三区,中文人妻av高清一区二区,中文字幕乱偷无码av先锋

PIC18F8620 Datasheet

  • PIC18F8620

  • 64/80-Pin High-Performance,256 Kbit to 1 Mbit Enhanced Flash...

  • 380頁

  • Microchip   Microchip

掃碼查看芯片數(shù)據(jù)手冊

上傳產品規(guī)格書

PDF預覽

PIC18F6520/8520/6620/8620/6720/8720
5.2.2
TABLAT 鈥?TABLE LATCH REGISTER
5.2.4
TABLE POINTER BOUNDARIES
The Table Latch (TABLAT) is an 8-bit register mapped
into the SFR space. The Table Latch is used to hold
8-bit data during data transfers between program
memory and data RAM.
TBLPTR is used in reads, writes and erases of the
Flash program memory.
When a
TBLRD
is executed, all 22 bits of the Table
Pointer determine which byte is read from program
memory into TABLAT.
When a
TBLWT
is executed, the three LSbs of the Table
Pointer (TBLPTR<2:0>) determine which of the eight
program memory holding registers is written to. When
the timed write to program memory (long write) begins,
the 19 MSbs of the Table Pointer, TBLPTR
(TBLPTR<21:3>), will determine which program mem-
ory block of 8 bytes is written to. For more detail, see
Section 5.5 鈥淲riting to Flash Program Memory鈥?
When an erase of program memory is executed, the
16 MSbs of the Table Pointer (TBLPTR<21:6>) point to
the 64-byte block that will be erased. The Least
Significant bits (TBLPTR<5:0>) are ignored.
Figure 5-3 describes the relevant boundaries of
TBLPTR based on Flash program memory operations.
5.2.3
TBLPTR 鈥?TABLE POINTER
REGISTER
The Table Pointer (TBLPTR) addresses a byte within
the program memory. The TBLPTR is comprised of
three SFR registers: Table Pointer Upper Byte, Table
Pointer High Byte and Table Pointer Low Byte
(TBLPTRU:TBLPTRH:TBLPTRL). These three regis-
ters join to form a 22-bit wide pointer. The low-order 21
bits allow the device to address up to 2 Mbytes of
program memory space. The 22nd bit allows access to
the Device ID, the User ID and the configuration bits.
The Table Pointer, TBLPTR, is used by the
TBLRD
and
TBLWT
instructions. These instructions can update the
TBLPTR in one of four ways, based on the table oper-
ation. These operations are shown in Table 5-1. These
operations on the TBLPTR only affect the low-order
21 bits.
TABLE 5-1:
TABLE POINTER OPERATIONS WITH
TBLRD
AND
TBLWT
INSTRUCTIONS
Operation on Table Pointer
TBLPTR is not modified
TBLPTR is incremented after the read/write
TBLPTR is decremented after the read/write
TBLPTR is incremented before the read/write
Example
TBLRD*
TBLWT*
TBLRD*+
TBLWT*+
TBLRD*-
TBLWT*-
TBLRD+*
TBLWT+*
FIGURE 5-3:
21
TABLE POINTER BOUNDARIES BASED ON OPERATION
TBLPTRU
16
15
TBLPTRH
8
7
TBLPTRL
0
ERASE
鈥?/div>
TBLPTR<20:6>
WRITE
鈥?/div>
TBLPTR<21:3>
READ
鈥?/div>
TBLPTR<21:0>
DS39609B-page 64
錚?/div>
2004 Microchip Technology Inc.

PIC18F8620相關型號PDF文件下載

  • 型號
    版本
    描述
    廠商
    下載
  • 英文版
    8-Pin FLASH-Based 8-Bit CMOS Microcontrollers
    MICROCHIP
  • 英文版
    8-Pin, 8-Bit CMOS Microcontroller with EEPROM Data Memory
    MICROCHIP ...
  • 英文版
    8-Pin, 8-Bit CMOS Microcontroller with A/D Converter and EEP...
    MICROCHIP ...
  • 英文版
    8-Pin, 8-Bit CMOS Microcontrollers
    MICROCHIP ...
  • 英文版
    EPROM Memory Programming Specification
    MICROCHIP ...
  • 英文版
    8-Pin FLASH-Based 8-Bit CMOS Microcontrollers
    MICROCHIP ...
  • 英文版
    Microcontroller
    MICROCHIP
  • 英文版
    Microcontroller 
    Microchip
  • 英文版
    Microcontroller
    ETC
  • 英文版
    EPROM-Based 8-Bit CMOS Microcontroller
    MICROCHIP
  • 英文版
    8-Pin, 8-Bit CMOS Microcontrollers
    MICROCHIP
  • 英文版
    8-Pin, 8-Bit CMOS Microcontrollers
    MICROCHIP ...
  • 英文版
    ETC
  • 英文版
    EPROM Memory Programming Specification
    MICROCHIP
  • 英文版
    EPROM Memory Programming Specification
    MICROCHIP ...
  • 英文版
    28-Pin Programmable Mixed Signal Controller
    Microchip
  • 英文版
    EPROM Memory Programming Specification
    Microchip
  • 英文版
    Microcontroller
    ETC
  • 英文版
    Microcontroller
    ETC
  • 英文版
    EPROM/ROM-Based 8-Bit CMOS Microcontroller Series
    MICROCHIP

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務：
賣家服務：
技術客服：

0571-85317607

網站技術支持

13606545031

客服在線時間周一至周五
9:00-17:30

關注官方微信號，
第一時間獲取資訊。

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫提出的寶貴意見，您的參與是維庫提升服務的動力！意見一經采納，將有感恩紅包奉上哦！