欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數(shù)資料
型號: MC68B912B32FU8
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 16-Bit Microcontroller
中文描述: 16-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數(shù): 103/128頁
文件大小: 748K
代理商: MC68B912B32FU8
MC68HC912B32
MC68HC912B32TS/D
MOTOROLA
103
Decreases the CPU overhead associated with servicing interrupts while operating a serial communica-
tion protocol. It provides an index offset that is directly related to the BDLC’s current state.
I0, I1, I2, I3 — Interrupt Source
Source of the pending interrupt request. Bits are encoded according to
Table 35
.
Bits I0, I1, I2, and I3 are cleared by a read of the BSVR register except when the BDLC data register
needs servicing (RDRF, RXIFR, or TDRE conditions). RXIFR and RDRF can only be cleared by a read
of the BSVR register followed by a read of BDR. TDRE can either be cleared by a read of the BSVR
register followed by a write to the BDLC BDR register, or by setting the TEOD bit in BCR2.
Upon receiving a BDLC interrupt, the user may read the value within the BSVR, transferring it to the
CPU’s index register. The value can be used to index a jump table to access a service routine. For ex-
ample:
SERVICE
LDX
JMP
BSVR
JMPTAB,X
Fetch State Vector Number
Enter service routine,
(must end in an RTI)
*
*
JMPTAB
JMP
NOP
JMP
NOP
JMP
NOP
.
.
.
JMP
END
SERVE0
Service condition #0
SERVE1
Service condition #1
SERVE2
Service condition #2
SERVE8
Service condition #8
NOP instructions are used to align the JMP instructions onto 4-byte boundaries so that the value in the
BSVR may be used intact. Each of the service routines must end with an RTI instruction.
BSVR —
BDLC State Vector Register
$00F9
Bit 7
6
5
4
3
2
1
Bit 0
0
0
I3
I2
I1
I0
0
0
RESET:
0
0
0
0
0
0
0
0
Table 35 Interrupt Sources
BSVR
$00
$04
$08
$0C
$10
$14
$18
$1C
$20
I3
0
0
0
0
0
0
0
0
1
I2
0
0
0
0
1
1
1
1
0
I1
0
0
1
1
0
0
1
1
0
I0
0
1
0
1
0
1
0
1
0
Interrupt Source
No Interrupts Pending
Received EOF
Received IFR byte (RXIFR)
Rx data register full (RDRF)
Tx data register empty (TDRE)
Loss of arbitration
CRC error
Symbol invalid or out of range
Wakeup
Priority
0 (lowest)
1
2
3
4
5
6
7
8 (highest)
相關(guān)PDF資料
PDF描述
MC68C912B32CFU8 16-Bit Microcontroller
MC68CK338 Highly Integrated, Low-Power, 32-Bit Microcontroller
MC68EC060 32-Bit Microprocessors.(32位微處理器)
MC68EN360RC25V QUad Integrated Communications Controller Users Manual
MC68EN360CFE25 QUad Integrated Communications Controller Users Manual
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68BOOL 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:8-BIT MICROPROCESSING UNIT (MPU)
MC68BOOP 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:8-BIT MICROPROCESSING UNIT (MPU)
MC68BOOS 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:8-BIT MICROPROCESSING UNIT (MPU)
MC68C812A4 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Technical Supplement MC68C812A4 3.3V Electrical Characteristics
MC68C912B32CFU8 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:16-Bit Microcontroller
主站蜘蛛池模板: 珠海市| 辰溪县| 太仆寺旗| 定州市| 达州市| 文水县| 浦东新区| 左贡县| 临沧市| 宿迁市| 姜堰市| 武山县| 承德县| 临沂市| 平昌县| 枞阳县| 丹寨县| 工布江达县| 卓尼县| 襄樊市| 曲阜市| 宜君县| 炎陵县| 临江市| 沐川县| 固安县| 滦平县| 明星| 庄浪县| 永济市| 广汉市| 武义县| 中西区| 密山市| 友谊县| 东兴市| 大庆市| 黄冈市| 潜江市| 郑州市| 茂名市|