- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄11581 > ENC424J600T-I/ML (Microchip Technology)IC ETHERNET CTRLR W/SPI 44-QFN PDF資料下載
參數(shù)資料
| 型號(hào)： | ENC424J600T-I/ML |
| 廠商： | Microchip Technology |
| 文件頁數(shù)： | 90/168頁 |
| 文件大小： | 0K |
| 描述： | IC ETHERNET CTRLR W/SPI 44-QFN |
| 視頻文件： | Fast 100 Mbps Ethernet PICtail Plus Overview |
| 標(biāo)準(zhǔn)包裝： | 1,600 |
| 控制器類型： | 以太網(wǎng)控制器（IEEE 802.3） |
| 接口： | SPI |
| 電源電壓： | 3 V ~ 3.6 V |
| 電流 - 電源： | 96mA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 44-VQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 44-QFN（8x8） |
| 包裝： | 帶卷 (TR) |
| 配用： | AC164132-ND - BOARD DAUGHTER PICTAIL ETHERNET |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁當(dāng)前第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁第140頁第141頁第142頁第143頁第144頁第145頁第146頁第147頁第148頁第149頁第150頁第151頁第152頁第153頁第154頁第155頁第156頁第157頁第158頁第159頁第160頁第161頁第162頁第163頁第164頁第165頁第166頁第167頁第168頁
PIC16CR7X
DS21993C-page 26
2007 Microchip Technology Inc.
2.3
PCL and PCLATH
The Program Counter (PC) is 13 bits wide. The low
byte comes from the PCL register, which is a readable
and writable register. The upper bits (PC<12:8>) are
not readable, but are indirectly writable through the
PCLATH register. On any Reset, the upper bits of the
PC will be cleared. Figure 2-1 shows the two situations
for the loading of the PC. The upper example in the
figure shows how the PC is loaded on a write to PCL
(PCLATH<4:0>
→ PCH). The lower example in the
figure shows how the PC is loaded during a CALL or
GOTO
instruction (PCLATH<4:3>
→ PCH).
FIGURE 2-4:
LOADING OF PC IN
DIFFERENT SITUATIONS
2.3.1
COMPUTED GOTO
A computed GOTO is accomplished by adding an offset
to the program counter (ADDWF PCL). When doing a
table read using a computed GOTO method, care
should be exercised if the table location crosses a PCL
memory boundary (each 256 byte block). Refer to the
Application
Note,
“Implementing
a
Table
Read”
(AN556).
2.3.2
STACK
The PIC16CR7X family has an 8-level deep x 13-bit
wide hardware stack. The stack space is not part of
either program or data space and the Stack Pointer is
not readable or writable. The PC is PUSHed onto the
stack when a CALL instruction is executed, or an inter-
rupt causes a branch. The stack is POPed in the event
of a RETURN, RETLW or a RETFIE instruction execu-
tion. PCLATH is not affected by a PUSH or POP
operation.
The stack operates as a circular buffer. This means that
after the stack has been PUSHed eight times, the ninth
push overwrites the value that was stored from the first
push. The tenth push overwrites the second push (and
so on).
2.4
Program Memory Paging
PIC16CR7X devices are capable of addressing a con-
tinuous 8K word block of program memory. The CALL
and GOTO instructions provide only 11 bits of address to
allow branching within any 2K program memory page.
When doing a CALL or GOTO instruction, the upper 2
bits of the address are provided by PCLATH<4:3>.
When doing a CALL or GOTO instruction, the user must
ensure that the page select bits are programmed so
that the desired program memory page is addressed. If
a return from a CALL instruction (or interrupt) is exe-
cuted, the entire 13-bit PC is popped off the stack.
Therefore, manipulation of the PCLATH<4:3> bits are
not required for the RETURN instructions (which POPs
the address from the stack).
Example 2-1 shows the calling of a subroutine in
page 1 of the program memory. This example assumes
that PCLATH is saved and restored by the Interrupt
Service Routine (if interrupts are used).
EXAMPLE 2-1:
CALL OF A SUBROUTINE
IN PAGE 1 FROM PAGE 0
PC
12
8
7
0
5
PCLATH<4:0>
PCLATH
Instruction with
ALU
GOTO,CALL
Opcode <10:0>
8
PC
12
11 10
0
11
PCLATH<4:3>
PCH
PCL
87
2
PCLATH
PCH
PCL
PCL as
Destination
Note 1: There are no Status bits to indicate stack
overflow or stack underflow conditions.
2: There are no instructions/mnemonics
called PUSH or POP. These are actions
that occur from the execution of the
CALL,
RETURN,
RETLW
and RETFIE
instructions, or the vectoring to an
interrupt address.
Note:
The
contents
of
the
PCLATH
are
unchanged after a RETURN or RETFIE
instruction is executed. The user must
setup the PCLATH for any subsequent
CALLS
or GOTOS.
ORG
0x500
BCF
PCLATH,4
BSF
PCLATH,3 ;Select page 1
;(800h-FFFh)
CALL
SUB1_P1
;Call subroutine in
:
;page 1 (800h-FFFh)
:
ORG
0x900
;page 1 (800h-FFFh)
SUB1_P1
:
;called subroutine
:
;page 1 (800h-FFFh)
:
RETURN
;return to Call
;subroutine in page 0
;(000h-7FFh)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PIC16F677-E/P | IC PIC MCU FLASH 2KX14 20DIP |
| MCP2155-I/P | IC IRDA PROTOCOL CTRLR 18DIP |
| MCP2150T-I/SS | IC IRDA STD CONTROLLER 20SSOP |
| MCP2155T-I/SO | IC IRDA PROTOCOL CONTRLR 18-SOIC |
| PIC18F25J10T-I/SS | IC PIC MCU FLASH 16KX16 28SSOP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ENC424J600T-IPT | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Stand-Alone 10/100 Ethernet Controller with SPI or Parallel Interface |
| ENC431D05A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| ENC431D-05A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:STD MOV |
| ENC431D07A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| ENC431D-07A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:STD MOV |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。