參數(shù)資料
型號: AT89C51CC02CA-TISUM
廠商: Atmel
文件頁數(shù): 148/159頁
文件大小: 0K
描述: IC 8051 MCU 16K FLASH 28-SOIC
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
標(biāo)準(zhǔn)包裝: 972
系列: AT89C CAN
核心處理器: 8051
芯體尺寸: 8-位
速度: 40MHz
連通性: CAN,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 20
程序存儲器容量: 16KB(16K x 8)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 2K x 8
RAM 容量: 512 x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 28-SOIC(0.295",7.50mm 寬)
包裝: 管件
配用: AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU
89
AT/T89C51CC02
4126L–CAN–01/08
Time Trigger
Communication (TTC)
and Message Stamping
The T89C51CC02 has a programmable 16-bit Timer (CANTIMH&CANTIML) for mes-
sage stamp and TTC.
This CAN Timer starts after the CAN controller is enabled by the ENA bit in the CANG-
CON register.
Two modes in the timer are implemented:
Time Trigger Communication:
Capture of this timer value in the CANTTCH & CANTTCL registers on Start
Of Frame (SOF) or End Of Frame (EOF), depending on the SYNCTTC bit in
the CANGCON register, when the network is configured in TTC by the TTC
bit in the CANGCON register.
Note:
In this mode, CAN only sends the frame once, even if an error occurs.
Message Stamping
Capture of this timer value in the CANSTMPH & CANSTMPL registers of the
message object which received or sent the frame.
All messages can be stamps.
The stamping of a received frame occurs when the RxOk flag is set.
The stamping of a sent frame occurs when the TxOk flag is set.
The CAN Timer works in a roll-over from FFFFh to 0000h which serves as a time base.
When the timer roll-over from FFFFh to 0000h, an interrupt is generated if the ETIM bit
in the interrupt enable register IEN1 is set.
Figure 44. Block Diagram of CAN Timer
EOF on CAN frame
ENA
CANGCON.1
CANTCON
RXOK i
CANSTCH.5
TXOK i
CANSTCH.4
÷ 6
Fcan
CLOCK
SOF on CAN frame
TTC
CANGCON.5
SYNCTTC
CANGCON.4
CANTTCH & CANTTCL
CANSTMPH & CANSTMPL
CANTIMH & CANTIML
OVRTIM
CANGIT.5
When 0xFFFF to 0x0000
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