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參數(shù)資料
| 型號(hào)： | KSZ8895RQ |
| 廠商： | Micrel Inc |
| 文件頁(yè)數(shù)： | 21/119頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC 10/100-T 5 PORT SW 128PQFP |
| 標(biāo)準(zhǔn)包裝： | 66 |
| 系列： | * |
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2011-2012 Microchip Technology Inc.
Preliminary
DS41579C-page 117
PIC16(L)F1782/3
13.0 I/O PORTS
Each port has three standard registers for its operation.
These registers are:
TRISx registers (data direction)
PORTx registers (reads the levels on the pins of
the device)
LATx registers (output latch)
Some ports may have one or more of the following
additional registers. These registers are:
ANSELx (analog select)
WPUx (weak pull-up)
In general, when a peripheral is enabled on a port pin,
that pin cannot be used as a general purpose output.
However, the pin can still be read.
The Data Latch (LATx registers) is useful for
read-modify-write operations on the value that the I/O
pins are driving.
A write operation to the LATx register has the same
effect as a write to the corresponding PORTx register.
A read of the LATx register reads of the values held in
the I/O PORT latches, while a read of the PORTx
register reads the actual I/O pin value.
Ports that support analog inputs have an associated
ANSELx register. When an ANSEL bit is set, the digital
input buffer associated with that bit is disabled.
Disabling the input buffer prevents analog signal levels
on the pin between a logic high and low from causing
excessive current in the logic input circuitry. A
simplified model of a generic I/O port, without the
interfaces to other peripherals, is shown in Figure 13-1.
FIGURE 13-1:
GENERIC I/O PORT
OPERATION
EXAMPLE 13-1:
INITIALIZING PORTA
TABLE 13-1:
PORT AVAILABILITY PER
DEVICE
Device
PO
RT
A
PORTB
PORTC
PORTE
PIC16(L)F1782
●●●●
PIC16(L)F1783
●●●●
Q
D
CK
Write LATx
Data Register
I/O pin
Read PORTx
Write PORTx
TRISx
Read LATx
Data Bus
To peripherals
ANSELx
VDD
VSS
; This code example illustrates
; initializing the PORTA register. The
; other ports are initialized in the same
; manner.
BANKSEL PORTA
;
CLRF
PORTA
;Init PORTA
BANKSEL LATA
;Data Latch
CLRF
LATA
;
BANKSEL ANSELA
;
CLRF
ANSELA
;digital I/O
BANKSEL TRISA
;
MOVLW
B'00111000' ;Set RA<5:3> as inputs
MOVWF
TRISA
;and set RA<2:0> as
;outputs
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| KSZ8895RQ TR | 功能描述:以太網(wǎng) IC 5-port Switch, one SW5-RMII and one P5-RMII Interface RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| KSZ8895RQ-EVAL | 功能描述:以太網(wǎng)開發(fā)工具 5-port Switch, one SW5-RMII and one P5-RMII Interface - Evaluation Board RoHS:否 制造商:Micrel 產(chǎn)品:Evaluation Boards 類型:Ethernet Transceivers 工具用于評(píng)估:KSZ8873RLL 接口類型:RMII 工作電源電壓: |
| KSZ8895RQI | 功能描述:以太網(wǎng) IC I-Temp 5-port Switch, one SW5-RMII and one P5-RMII Interface RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| KSZ8895RQI TR | 功能描述:以太網(wǎng) IC I-Temp 5-port Switch, one SW5-RMII and one P5-RMII Interface RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| KSZ8895RQXCA | 功能描述:Ethernet Switch 10/100 Base-T/TX PHY RMII Interface 128-PQFP (14x20) 制造商:microchip technology 系列:- 包裝:托盤 零件狀態(tài):有效 協(xié)議:以太網(wǎng) 功能:開關(guān) 接口:RMII 標(biāo)準(zhǔn):10/100 Base-T/TX PHY 電壓 - 電源:1.8V，2.5V，3.3V 電流 - 電源:- 工作溫度:0°C ~ 70°C 封裝/外殼:128-BFQFP 供應(yīng)商器件封裝:128-PQFP（14x20） 標(biāo)準(zhǔn)包裝:66 |
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