T89C51CC01CA-RLTIM Atmel, T89C51CC01CA-RLTIM Datasheet - Page 86
![IC 8051 MCU FLASH 32K 44VQFP](/photos/6/92/69202/313-44-vqfp_sml.jpg)
T89C51CC01CA-RLTIM
Manufacturer Part Number
T89C51CC01CA-RLTIM
Description
IC 8051 MCU FLASH 32K 44VQFP
Manufacturer
Atmel
Series
AT89C CANr
Datasheets
1.T89C51CC01CA-7CTIM.pdf
(167 pages)
2.T89C51CC01CA-7CTIM.pdf
(12 pages)
3.T89C51CC01CA-7CTIM.pdf
(32 pages)
4.T89C51CC01CA-7CTIM.pdf
(29 pages)
Specifications of T89C51CC01CA-RLTIM
Core Processor
8051
Core Size
8-Bit
Speed
40MHz
Connectivity
CAN, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
32
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
For Use With
AT89STK-06 - KIT DEMOBOARD 8051 MCU W/CAN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
T89C51CC01CARLTIM
Available stocks
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Manufacturer
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- T89C51CC01CA-7CTIM PDF datasheet
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Bit Timing and Baud Rate
Figure 47. Sample And Transmission Point
86
A/T89C51CC01
CLOCK
FCAN
Prescaler BRP
FSM’s (Finite State Machine) of the CAN channel need to be synchronous to the time
quantum. So, the input clock for bit timing is the clock used into CAN channel FSM’s.
Field and segment abbreviations:
•
•
•
•
•
•
•
•
The total number of TQ in a bit time has to be programmed at least from 8 to 25.
The baud rate selection is made by Tbit calculation:
Tbit = Tsyns + Tprs + Tphs1 + Tphs2
1. Tsyns = Tscl = (BRP[5..0]+ 1)/Fcan = 1TQ.
2. Tprs = (1 to 8) * Tscl = (PRS[2..0]+ 1) * Tscl
3. Tphs1 = (1 to 8) * Tscl = (PHS1[2..0]+ 1) * Tscl
4. Tphs2 = (1 to 8) * Tscl = (PHS2[2..0]+ 1) * Tscl
5. Tsjw = (1 to 4) * Tscl = (SJW[1..0]+ 1) * Tscl
The total number of Tscl (Time Quanta) in a bit time must be comprised between 8 to
25.
BRP: Baud Rate Prescaler.
TQ: Time Quantum (output of Baud Rate Prescaler).
SYNS: SYNchronization Segment is 1 TQ long.
PRS: PRopagation time Segment is programmable to be 1, 2, ..., 8 TQ long.
PHS1: PHase Segment 1 is programmable to be 1, 2, ..., 8 TQ long.
PHS2: PHase Segment 2 is programmable to be superior or equal to the
INFORMATION PROCESSING TIME and inferior or equal to TPHS1.
INFORMATION PROCESSING TIME is 2 TQ.
SJW: (Re) Synchronization Jump Width is programmable to be minimum of PHS1
and 4.
Tphs2 = Max of (Tphs1 and 2TQ)
System clock Tscl
Time Quantum
PRS 3-bit length
PHS1 3-bit length
PHS2 3-bit length
SJW 2-bit length
Bit Timing
Sample point
Transmission point
4129N–CAN–03/08
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