UPD70F3765GF-GAT-AX Renesas Electronics America, UPD70F3765GF-GAT-AX Datasheet - Page 1007

• Manufacturer Part Number: UPD70F3765GF-GAT-AX
• Description: MCU 32BIT V850ES/JX3-H 128-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3-Hr

Specifications of UPD70F3765GF-GAT-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 48MHz
• Connectivity: CSI, EBI/EMI, I²C, UART/USART, USB
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 96
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 40K x 8
• Voltage - Supply (vcc/vdd): 2.85 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

V850ES/JG3-H, V850ES/JH3-H
20.14 Time Stamp Function
consequence, the clocks of the nodes have no relation (i.e., the clocks are asynchronous and may even have different
frequencies).
up a global time base, a time stamp function is used. The essential mechanism of a time stamp function is the capture of
timer values triggered by signals on the CAN bus.
20.14.1 Time stamp function
unit in a microcontroller system is used in addition to the CAN controller. The 16-bit capture timer unit captures the timer
value according to a trigger signal (TSOUT) for capturing that is output when a data frame is received from the CAN
controller. The CPU can retrieve the time of occurrence of the capture event, i.e., the time stamp of the message received
from the CAN bus, by reading the captured value. The TSOUT signal can be selected from the following two event
sources and is specified by the C0TS.TSSEL bit.
the SOF is used as the trigger event source). To capture a timer value by using the TSOUT signal, the capture timer unit
must detect the capture signal at both the rising edge and falling edge.
signal toggles upon occurrence of the selected event. If the TSLOCK bit is set to 1, the TSOUT signal toggles upon
occurrence of the selected event, but the toggle is stopped as the TSEN bit is automatically cleared to 0 when a data
frame starts to be received and stored in message buffer 0. This suppresses the subsequent toggle occurrence by the
TSOUT signal, so that the time stamp value toggled last (= captured last) can be saved as the time stamp value of the
time at which the data frame was received in message buffer 0.
R01UH0042EJ0400 Rev.4.00
Sep 30, 2010
CAN is an asynchronous, serial protocol. All nodes connected to the CAN bus have a local, autonomous clock. As a
In some applications, however, a common time base over the network (= global time base) is needed. In order to build
The CAN controller supports the capturing of timer values triggered by a specific frame. An on-chip 16-bit capture timer
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•
The TSOUT signal is enabled by setting the C0TS.TSEN bit to 1.
The TSOUT signal toggles its level upon occurrence of the selected event during data frame reception (in Figure 20-34,
This time stamp function is controlled by the C0TS.TSLOCK bit. When the TSLOCK bit is cleared to 0, the TSOUT
SOF event (start of frame)
EOF event (last bit of end of frame) (TSSEL bit = 1)
TSOUT
SOF
Figure 20-35. Timing Diagram of Capture Signal TSOUT
(TSSEL bit = 0)
SOF
SOF
CHAPTER 20 CAN CONTROLLER
SOF
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