参数资料
型号: KSZ8851-16MLL-EVAL
厂商: Micrel Inc
文件页数: 76/84页
文件大小: 0K
描述: BOARD EVALUATION KSZ8851-16MLL
产品培训模块: KSZ8851 10/100 Embedded Controllers
标准包装: 1
系列: LinkMD®
主要目的: 接口,以太网控制器(PHY 和 MAC)
嵌入式:
已用 IC / 零件: KSZ8851-16MLL
主要属性: 1 个端口,100BASE-TX/10BASE-T
次要属性: 8/16 位接口,LinkMD 线缆诊断
已供物品: 板,文档
产品目录页面: 1081 (CN2011-ZH PDF)
相关产品: 576-3438-ND - IC CTLR MAC/PHY NON PCI 128PQFP
576-3253-ND - IC CTLR MAC/PHY NON-PCI 128-PQFP
576-3252-ND - IC CTLR MAC/PHY NON-PCI 48-LQFP
其它名称: 576-3292
PIC16F7X
DS30325B-page 76
2002 Microchip Technology Inc.
FIGURE 10-5:
ASYNCHRONOUS RECEPTION
Steps to follow when setting up an Asynchronous
Reception:
1.
Initialize the SPBRG register for the appropriate
baud rate. If a high speed baud rate is desired,
set bit BRGH (Section 10.1).
2.
Enable the asynchronous serial port by clearing
bit SYNC and setting bit SPEN.
3.
If interrupts are desired, then set enable bit
RCIE.
4.
If 9-bit reception is desired, then set bit RX9.
5.
Enable the reception by setting bit CREN.
6.
Flag bit RCIF will be set when reception is com-
plete and an interrupt will be generated if enable
bit RCIE is set.
7.
Read the RCSTA register to get the ninth bit (if
enabled) and determine if any error occurred
during reception.
8.
Read the 8-bit received data by reading the
RCREG register.
9.
If any error occurred, clear the error by clearing
enable bit CREN.
10. If using interrupts, ensure that GIE and PEIE in
the INTCON register are set.
TABLE 10-6:
REGISTERS ASSOCIATED WITH ASYNCHRONOUS RECEPTION
START
bit
bit7/8
bit1
bit0
bit7/8
bit0
STOP
bit
START
bit
START
bit
bit7/8
STOP
bit
RX (pin)
Reg
Rcv Buffer Reg
Rcv Shift
Read Rcv
Buffer reg
RCREG
RCIF
(Interrupt Flag)
OERR bit
CREN
Word 1
RCREG
Word 2
RCREG
STOP
bit
Note:
This timing diagram shows three words appearing on the RX input. The RCREG (receive buffer) is read after the third word,
causing the OERR (overrun) bit to be set. An overrun error indicates an error in user firmware.
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on:
POR,
BOR
Value on
all other
RESETS
0Bh, 8Bh,
10Bh,18Bh
INTCON
GIE
PEIE
TMR0IE
INTE
RBIE
TMR0IF
INTF
RBIF
0000 000x
0000 000u
0Ch
PIR1
PSPIF(1)
ADIF
RCIF
TXIF
SSPIF
CCP1IF
TMR2IF
TMR1IF
0000 0000
18h
RCSTA
SPEN
RX9
SREN
CREN
FERR
OERR
RX9D
0000 -00x
1Ah
RCREG USART Receive Register
0000 0000
8Ch
PIE1
PSPIE(1)
ADIE
RCIE
TXIE
SSPIE
CCP1IE
TMR2IE
TMR1IE
0000 0000
98h
TXSTA
CSRC
TX9
TXEN
SYNC
BRGH
TRMT
TX9D
0000 -010
99h
SPBRG
Baud Rate Generator Register
0000 0000
Legend: x = unknown, - = unimplemented locations read as '0'. Shaded cells are not used for asynchronous reception.
Note
1: Bits PSPIE and PSPIF are reserved on the PIC16F73/76 devices; always maintain these bits clear.
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