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參數(shù)資料
| 型號(hào)： | PXAC37KBA |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-bit microcontroller family(16位微控制器系列) |
| 中文描述： | 16-BIT, OTPROM, 32 MHz, MICROCONTROLLER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁(yè)數(shù)： | 52/68頁(yè) |
| 文件大?。?/td> | 344K |
| 代理商： | PXAC37KBA |
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Philips Semiconductors
Preliminary specification
XA-C3
XA 16-bit microcontroller family
32K/1024 OTP CAN transport layer controller
1 UART, 1 SPI Port, CAN 2.0B, 32 CAN ID filters, transport layer co-processor
2000 Jan 25
45
Table 24. Format for storing the CANopen Acknowledge byte
7
Byte offset 0
Byte offset 1
Byte offset 2
Byte offset 3
Byte offset 4
Byte offset 5
Byte offset 6
Byte offset 7
6
5
4
3
X
2
X
1
X
0
X
scs
t = d.c.
Not used in the protocol
MnFCR: Message n Fragmentation Count Register
Address: MMR base + nEh
Access: Read, write. Byte or word access.
Reset Value: 00xxxxxxb (unused bits are always read as ‘0’)
MNFCR
7
–
6
–
5
4
3
2
1
0
count
An object’s Fragmentation Count Register need not be configured
by the User in DeviceNet systems. However, in CANopen and
OSEK systems, the User must initialize this register.
GCTL: Global Control Byte (applies to all objects)
Address: MMR base + 27Eh
Access: Read, write, R/M/W, byte or word
Reset Value: 00h
GCTL
7
–
6
–
5
–
4
–
3
2
1
0
Auto_Ack
Pre_Arb
Prtcl1
Prtcl0
Auto_Ack
Enables automatic acknowledge for CANopen.
0 = disable, 1 = enable.
Establishes the transmit pre–arbitration
scheme. 0 = Pre–arbitration based on CAN ID,
object number is secondary tie–breaker. 1 =
Pre–arbitration based on object number only.
Indicates CTL protocol of the system (if any).
00 = CAN
01 = DeviceNet
10 = CANopen
11 = OSEK
Pre_Arb
[Prtcl1 Prtcl0]
Transmit Message Objects and the Transmit
Process
In order to transmit a message, the XA application program needs to
first assemble the complete message and store it in the message
buffer area for that Message Object (the address of the message
buffer would have been previously programmed into the object’s
MnBLR register). The header (CAN ID and Frame Information) must
be written to the object’s MnMIDH, MnMIDL, and MnMSKH registers
as appropriate.
When the above is done, the Application is ready to transmit the
message. To initiate a transmission, the object enable bit (OBJ_EN)
must be set (except when transmitting an Auto–Acknowledge frame
in CANopen). This will allow this ready–to–transmit message to
participate in the pre–arbitration process.
If more than one message is ready to be transmitted. A so–called
pre–arbitration process will be performed to determine which
Message Object will be selected for transmission. There are two
pre–arbitration policies which the User can choose between by
setting or clearing the Pre_Arb bit in the GCTL register.
After a Tx Message Complete, the Tx Pre–Arbitration process is
“reset”, and begins again. Also, if the winning Message Object
subsequently loses arbitration on the CAN bus, the Tx
Pre–Arbitration process gets reset and begins again.
If there is only one transmit message whose OBJ_EN bit is set, it
will be selected regardless of the pre–arbitration policy.
Pre–Arbitration Based on Priority (default mode)
This mode is selected by writing ‘0’ to the Pre_Arb bit in GCTL[2].
The filter state machine goes through all transmit Message Objects
for which the OBJ_EN bit is set. The message with the highest
priority
as defined by the CAN arbitration ID field
will be selected
for transmission. If more than one pending transmit message share
the same CAN identifier, then secondary priority will be based on
XA-C3 Message Object numbers, with the lowest numbered object
winning access.
The winning message will then be output onto the CAN bus where it
will compete for access with other transmitting nodes.
Pre–Arbitration Based on Object Number
As an alternative, the User may select to base pre–arbitration on
Message Object number alone. This mode is selected by writing ‘1’
to the Pre_Arb bit in GCTL[2].
The pre–arbitration state machine will go through the Message
Objects sequentially, starting with object number 0, and select the
first encountered transmit Message Object, with OBJ_EN set to ‘1’,
for transmission. In other words, the order in which the messages
objects are examined in the pre–arbitration process is by increasing
object number n, where n = 0
…
31. Each time pre–arbitration begins,
the enabled message with the lowest object number will be selected
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| PXAC37KBBD | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:XA 16-bit microcontroller family 32K/1024 OTP CAN transport layer controller 1 UART, 1 SPI Port, CAN 2.0B, 32 CAN ID Filters, transport layer co-proce |
| PXAC37KFA | 功能描述:16位微控制器 - MCU OTP32K/1K 32 MHZ CAN EXT PLCC RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT |
| PXAC37KFA/00,512 | 功能描述:IC XA MCU 16BIT 32K OTP 44-PLCC RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:XA 標(biāo)準(zhǔn)包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設(shè)備:POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):21 程序存儲(chǔ)器容量:40KB（20K x 16） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 6x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤(pán) 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
| PXAC37KFBD | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:XA 16-bit microcontroller family 32K/1024 OTP CAN transport layer controller 1 UART, 1 SPI Port, CAN 2.0B, 32 CAN ID Filters, transport layer co-proce |
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