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參數(shù)資料
| 型號： | L9805 |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Super Smart Power Motor Driver with 8-BIT MCU, CAN Interface, 16K EPROM, 256Bytes RAM, 128 Bytes EEPROM, 10 Bit ADC, WDG, 2 Timers, 2 PWM Modules, Ful |
| 中文描述： | 超級智能型電動馬達(dá)驅(qū)動器，帶有8位微控制器，CAN接口，16K的存儲器，256Bytes RAM內(nèi)存，128字節(jié)EEPROM，10位ADC，水分散粒劑，2定時器，2個PWM模塊，涪陵 |
| 文件頁數(shù)： | 71/103頁 |
| 文件大?。?/td> | 853K |
| 代理商： | L9805 |
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L9805
CONTROLLER AREA NETWORK
(Cont’d)
IDENTIFIER LOW REGISTERS (IDLRx)
Read/Write
Reset Value: Undefined
ID[2:0]
are the least significant 3 bits of the 11-bit
message identifier.
RTR
is the Remote Transmission Request bit. It is
set to indicate a remote frame and reset to indicate
a data frame.
DLC[3:0]
is the Data Length Code. It gives the
number of bytes in the data field of the mes-
sage.The valid range is 0 to 8.
DATA REGISTERS (DATA0-7x)
Read/Write
Reset Value: Undefined
DATA[7:0]
is a message data byte. Up to eight such
bytes may be part of a message. Writing to byte
DATA7 initiates a transmit request and should al-
ways be done even when DATA7 is not part of the
message.
BUFFER CONTROL/STATUS REGs. (BCSRx)
Read/Write
Reset Value: 00h
ACC
Acceptance Code
Read Only
Set by hardware with the id of the highest priority
filter which accepted the message stored in the
buffer.
ACC = 0: Match for Filter/Mask0. Possible match
for Filter/Mask1.
ACC = 1: No match for Filter/Mask0 and match for
Filter/Mask1.
Reset by hardware when either RDY or RXIF gets
reset.
RDY
Message Ready
Read/Clear
Set by hardware to signal that a new error-free
message is available (LOCK = 0) or that a trans-
mission request is pending (LOCK = 1).
Cleared by software when LOCK = 0 to release
the buffer and to clear the corresponding RXIF bit
in the Interrupt Status Register.
Cleared by hardware when LOCK = 1 to indicate
that the transmission request has been serviced or
cancelled.
BUSY
Busy Buffer
Read Only
Set by hardware when the buffer is being filled
(LOCK = 0) or emptied (LOCK = 1).
Reset by hardware when the buffer is not ac-
cessed by the CAN core for transmission nor re-
ception purposes.
LOCK
Lock Buffer
Read/Set/Clear
Set by software to lock a buffer. No more message
can be received into the buffer thus preserving its
content and making it available for transmission.
Cleared by software to make the buffer available
for reception. Cancels any pending transmission
request.
Cleared by hardware once a message has been
successfully transmitted provided the early trans-
mit interrupt mode is on. Left untouched otherwise.
Note that in order to prevent any message corrup-
tion or loss of context, LOCK cannot be set nor re-
set while BUSY is set. Trying to do so will result in
LOCK not changing state.
7
0
ID2
ID1
ID0
RTR
DLC3
DLC2
DLC1
DLC0
7
0
DATA7
DATA6
DATA5
DATA4
DATA3
DATA2
DATA1
DATA0
7
0
0
0
0
0
ACC
RDY
BUSY
LOCK
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