NUC130LE3CN Nuvoton Technology Corporation of America, NUC130LE3CN Datasheet - Page 388

• Manufacturer Part Number: NUC130LE3CN
• Description: IC MCU 32BIT 128KB FLASH 48LQFP
• Manufacturer: Nuvoton Technology Corporation of America
• Series: NuMicro™ NUC100r

Specifications of NUC130LE3CN

• Core Processor: ARM Cortex-M0
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: CAN, I²C, IrDA, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
• Number Of I /o: 35
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Eeprom Size: -
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Data Converters: A/D 8x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5.13.6.10.4 Oscillator Tolerance Range
the spike; a recessive bus level is sampled.
In the second example, SJW is shorter than the phase error, so the Sample Point cannot be
shifted far enough; the dominant spike is sampled as actual bus level.
The oscillator tolerance range was increased when the CAN protocol was developed from
version 1.1 to version 1.2 (version 1.0 was never implemented in silicon). The option to
synchronize on edges from dominant to recessive became obsolete, only edges from recessive
to dominant are considered for synchronization. The protocol update to version 2.0 (A and B)
had no influence on the oscillator tolerance.
The tolerance range df for an oscillator frequency f osc around the nominal frequency f nom is:
( 1 – df ) • f nom ≤ f osc ≤ ( 1 + df ) • f nom
It depends on the proportions of Phase_Seg1, Phase_Seg2, SJW, and the bit time. The
maximum tolerance df is the defined by two conditions (both shall be met):
It has to be considered that SJW may not be larger than the smaller of the Phase Buffer
Segments and that the Propagation Time Segment limits that part of the bit time that may be
used for the Phase Buffer Segments.
Rx-input
Rx-input
Rx-input
Rx-input
NuMicro™ NUC130/NUC140 Technical Reference Manual
SJW >= Phase Error
SJW >= Phase Error
SJW < Phase Error
SJW < Phase Error
Sync_Seg
Sync_Seg
Sync_Seg
Note: These conditions base on the APB cock = f osc.
: I
II
Figure 5-86 Filtering of Short Dominant Spikes
:
df
df
<=
<=
Spike
Spike
Spike
Spike
2
Sample-Point
Sample-Point
Min
20
×
(
13
×
(
SJW
Phase_Seg1
Prop_Seg
Prop_Seg
Prop_Seg
bit_time
×
bit_time
Sample-Point
Sample-Point
- 388 -
−
,
Phase_Seg2
Phase_Seg2
Phase_Seg1
Phase_Seg1
Phase_Seg1
Publication Release Date: June 14, 2011
)
))
Sample-Point
Sample-Point
Sample-Point
Sample-Point
recessive
recessive
dominant
dominant
recessive
recessive
dominant
dominant
Phase_Seg2
Phase_Seg2
Phase_Seg2
Revision V2.01