MC68HC908GZ8MFA Freescale Semiconductor, MC68HC908GZ8MFA Datasheet - Page 135
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MC68HC908GZ8MFA
Manufacturer Part Number
MC68HC908GZ8MFA
Description
IC MCU 8K FLASH 8MHZ CAN 48-LQFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC68908GZ8CFJER.pdf
(314 pages)
Specifications of MC68HC908GZ8MFA
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
CAN, LIN, SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
37
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
48-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68HC908GZ8MFA
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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The synchronization jump width (SJW) can be programmed in a range of 1 to 4 time quanta by setting the
SJW parameter.
The above parameters can be set by programming the bus timing registers, CBTR0 and CBTR1. See
12.13.3 MSCAN08 Bus Timing Register 0
Table 12-8
Freescale Semiconductor
gives an overview on the CAN conforming segment settings and the related parameter values.
SYNC_SEG
Transmit point
Sample point
Segment 1
It is the user’s responsibility to make sure that the bit timing settings are in
compliance with the CAN standard,
5 .. 10
4 .. 11
5 .. 12
6 .. 13
7 .. 14
8 .. 15
9 .. 16
Time
Table 12-4. CAN Standard Compliant Bit Time Segment Settings
SYNC
_SEG
1
System expects transitions to occur on the bus during this period.
A node in transmit mode will transfer a new value to the CAN bus at this point.
A node in receive mode will sample the bus at this point. If the three samples
per bit option is selected then this point marks the position of the third sample.
MC68HC908GZ16 • MC68HC908GZ8 Data Sheet, Rev. 4
Figure 12-9. Segments Within the Bit Time
TSEG1
3 .. 10
4 .. 11
5 .. 12
6 .. 13
7 .. 14
8 .. 15
4 .. 9
Table 12-3. Time Segment Syntax
NRZ SIGNAL
(PROP_SEG + PHASE_SEG1)
8... 25 TIME QUANTA
TIME SEGMENT 1
= 1 BIT TIME
Segment 2
and
4 ... 16
Time
2
3
4
5
6
7
8
12.13.4 MSCAN08 Bus Timing Register
NOTE
TSEG2
1
2
3
4
5
6
7
SAMPLE POINT
(SINGLE OR TRIPLE SAMPLING)
(PHASE_SEG2)
Synchronized
TIME SEG. 2
Jump Width
2 ... 8
1 .. 2
1 .. 3
1 .. 4
1 .. 4
1 .. 4
1 .. 4
1 .. 4
0 .. 1
0 .. 2
0 .. 3
0 .. 3
0 .. 3
0 .. 3
0 .. 3
SJW
1.
Clock System
135
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