- 您现在的位置：买卖IC网 > PDF目录80582 > MC68HC05V7CB (FREESCALE SEMICONDUCTOR INC) 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP56 PDF资料下载
参数资料
| 型号： | MC68HC05V7CB |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP56 |
| 封装： | SDIP-56 |
| 文件页数： | 17/170页 |
| 文件大小： | 980K |
| 代理商： | MC68HC05V7CB |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页当前第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页第134页第135页第136页第137页第138页第139页第140页第141页第142页第143页第144页第145页第146页第147页第148页第149页第150页第151页第152页第153页第154页第155页第156页第157页第158页第159页第160页第161页第162页第163页第164页第165页第166页第167页第168页第169页第170页
SECTION 15: MESSAGE DATA LINK CONTROLLER
MOTOROLA
Page 99
MC68HC05V7 Specification Rev. 1.0
15.2.3
MDLC STATUS REGISTER (MSR) $0F
This register indicates the transmit and receive status of the MDLC.
All bits may be read in all modes of MCU operation.
Bits 0,1, 4, 5, 6, and 7 will always read as zeros and can never be written to.
Bits 2 and 3 are reflective of CPU interrupt request signals and are asserted as long as their
respective CPU interrupt request is pending. Neither bit is affected by CPU interrupt
requests generated when the MDLC ’wakes up’ from MDLC Stop or MDLC Wait mode.
All writes to this register are ignored in all modes of MCU operation.
15.2.3.1
TXMS - Transmitted Message Successfully
When set this bit indicates that the Tx Buffer contents have been sent successfully.
An access of the Tx Control Register (MTCR) will clear this bit.
15.2.3.2
RXMS - Received Message Successfully
When set, this bit indicates that one of the Rx Buffers contains a new message.
This bit can only be cleared if both Rx Buffers are empty. If only one message has been
received into an Rx Buffer by the MDLC, any access (read or write) of the MDLC Rx Status
Register (MRSR) will clear the RXMS bit.
If a second message is received after the RXMS bit has been cleared by the CPU as it is
retrieving the first message, the RXMS bit will immediately be set again, and will remain set
until the MRSR is accessed once the last message received is made available to the CPU.
If both Rx Buffers contain a received message, the RXMS bit will simply remain set until the
MRSR register is accessed once the last message received is made available to the CPU.
15.2.3.3
TXMS and RXMS Interrupts
If either the TXMS or the RXMS bit is set, and if interrupts are enabled, an interrupt request
will be made to the CPU. The interrupt service routine may poll these bits to establish the
cause of the interrupt. The mechanism for clearing each of these bits will also clear the
associated CPU interrupt request.
Alternatively, if interrupts are disabled, the CPU may poll these bits periodically to see if a
change in status has occurred.
Figure 15-4:
MDLC Status Register (MSR)
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
0
RXMS
TXMS
0
RESET
00000000
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相关PDF资料 |
PDF描述 |
|---|---|
| MC68HC711EA9VFS3 | 8-BIT, UVPROM, 3 MHz, MICROCONTROLLER, CQCC52 |
| MPC7400RX350TX | 32-BIT, 350 MHz, RISC PROCESSOR, CBGA360 |
| MPC8250ACVRLHDX | 32-BIT, 250 MHz, RISC PROCESSOR, PBGA516 |
| MC68HC11L1VFU2 | 8-BIT, 2 MHz, MICROCONTROLLER, PQFP64 |
| MC68HC08JL3CP | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP28 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC68HC05X16 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:High-density complementary metal oxide semiconductor HCMOS) microcontroller unit |
| MC68HC05X32 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:High-density complementary metal oxide semiconductor HCMOS) microcontroller unit |
| MC68HC05X4 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
| MC68HC05X4CDW | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
| MC68HC05X4DW | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
发布紧急采购，3分钟左右您将得到回复。