AT89C51CC01UA-RLRUM Atmel, AT89C51CC01UA-RLRUM Datasheet - Page 104

• Manufacturer Part Number: AT89C51CC01UA-RLRUM
• Description: IC 8051 MCU 32K FLASH 44-VQFP
• Manufacturer: Atmel
• Series: AT89C CANr

Specifications of AT89C51CC01UA-RLRUM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: CAN, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 1.25K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 1280 B
• Interface Type: UART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 34
• Number Of Timers: 2
• Operating Supply Voltage: 3 V to 5.5 V
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: CANADAPT28
• For Use With: AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AT89C51CC01UA-RLRUMTR

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A/T89C51CC01
Table 71. CANBT2 Register
CANBT2 (S:B5h)
CAN Bit Timing Registers 2
Note:
No default value after reset.
Number
Bit
6-5
3-1
7
-
7
4
0
The CAN controller bit timing registers must be accessed only if the CAN controller is dis-
abled with the ENA bit of the CANGCON register set to 0.
See Figure 48.
Bit Mnemonic Description
SJW 1
SJW1:0
PRS2:0
6
-
-
-
SJW 0
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Re-synchronization Jump Width
To compensate for phase shifts between clock oscillators of different bus
controllers, the controller must re-synchronize on any relevant signal edge of
the current transmission.
The synchronization jump width defines the maximum number of clock cycles.
A bit period may be shortened or lengthened by a re-synchronization.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Programming Time Segment
This part of the bit time is used to compensate for the physical delay times
within the network. It is twice the sum of the signal propagation time on the
bus line, the input comparator delay and the output driver delay.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
5
4
-
Tsjw = Tscl x (SJW [1..0] +1)
Tprs = Tscl x (PRS[2..0] + 1)
PRS 2
3
PRS 1
2
PRS 0
1
4129N–CAN–03/08
0
-