CP3-TB-BT26-0 National Semiconductor, CP3-TB-BT26-0 Datasheet - Page 120
CP3-TB-BT26-0
Manufacturer Part Number
CP3-TB-BT26-0
Description
BOARD TARGET FOR CP3BT26
Manufacturer
National Semiconductor
Type
Microcontrollerr
Datasheet
1.CP3-TB-BT26-0.pdf
(280 pages)
Specifications of CP3-TB-BT26-0
Contents
*
For Use With/related Products
CP3BT26
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
Q1879090A
- Current page: 120 of 280
- Download datasheet (5Mb)
www.national.com
19.2.7
The CAN prescaler (PSC) is shown is Figure 50. It divides
the CKI input clock by the value defined in the CTIM register.
The resulting clock is called time quanta clock and defines
the length of one time quantum (tq).
Please refer to CAN Timing Register (CTIM) on page 137
for a detailed description of the CTIM register.
Note: PSC is the value of the clock prescaler. TSEG1 and
TSEG2 are the length of time segment 1 and 2 in time quan-
ta.
The resulting bus clock can be calculated by the equation:
The values of PSC, TSEG1, and TSEG2 are specified by
the contents of the registers PSC, TSEG1, and TSEG2 as
follows:
busclock
Clock Generator
Signal
Clock
=
CAN
Bus
------------------------------------------------------------------------------------ -
PSC x 1
Signal
Clock
CAN
Bus
PREVIOUS
PREVIOUS
BIT
BIT
PREVIOUS
PREVIOUS
BIT
BIT
+
TSEG1
A
A
CKI
A
A
Figure 49. Resynchronization (e < -SJW)
Figure 48. Resynchronization (e > SJW)
e
+
TSEG2
TSEG1
TSEG1
"NORMAL" BIT TIME
BIT TIME LENGTHENED BY SJW
BIT TIME SHORTENED BY SJW
TSEG1
TSEG1
120
"NORMAL" BIT TIME
19.3
The CAN module has access to 15 independent message
buffers, which are memory mapped in RAM. Each message
buffer consists of 8 different 16-bit RAM locations and can
be individually configured as a receive message buffer or as
a transmit message buffer.
A dedicated acceptance filtering procedure enables soft-
ware to configure each buffer to receive only a single mes-
sage ID or a group of messages. One buffer uses an
CKI
TSEG2
PSC = PSC[5:0] + 2
TSEG1 = TSEG1[3:0] + 1
TSEG2 = TSEG2[2:0] + 1
SJW
MESSAGE TRANSFER
÷
PSC
TSEG2
Figure 50. CAN Prescaler
TSEG2
TSEG2
Internal Time
Quanta Clock (1/tq)
NEXT BIT
e
÷
NEXT BIT
(1+TSEG1+TSEG2)
NEXT BIT
DS030
DS029
Bit Rate
DS031
Related parts for CP3-TB-BT26-0
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
National Semiconductor [8-Bit D/A Converter]
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
National Semiconductor [Media Coprocessor]
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
AC97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound
Manufacturer:
National Semiconductor
Part Number:
Description:
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
General Purpose, Low Voltage, Low Power, Rail-to-Rail Output Operational Amplifiers
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
8-bit 20 MSPS flash A/D converter.
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
Low Noise Quad Operational Amplifier
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
Quad Differential Line Receivers
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
Quad High Speed Trapezoidal? Bus Transceiver
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
Dual Line Receiver
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
TTL to 10k ECL Level Translator with Latch
Manufacturer:
National Semiconductor
Datasheet: