UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 383

• Manufacturer Part Number: UPD78F0890GK(A)-GAJ-AX
• Description: 8BIT MCU, 128K FLASH, 7K RAM, LQFP
• Manufacturer: NEC

Specifications of UPD78F0890GK(A)-GAJ-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 10
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

(2) Remote frame
(3) Description of fields
<1> Start of frame (SOF)
A remote frame is composed of six fields.
Remarks 1. The data field is not transferred even if the control field’s data length code is not “0000B”.
The start of frame field is located at the start of a data frame or remote frame.
Remark
• If dominant level is detected in the bus idle state, a hard-synchronization is performed (the current TQ
• If dominant level is sampled at the sample point following such a hard-synchronization, the bit is
is assigned to be the SYNC segment).
assigned to be a SOF. If recessive level is detected, the protocol layer returns to the bus idle state
and regards the preceding dominant pulse as a disturbance only. No error frame is generated in
such case.
R
D
2. D: Dominant = 0
<1>
(Interframe space or bus idle)
R: Recessive = 1
D: Dominant = 0
R: Recessive = 1
<2>
<3>
Remote frame
Figure 16-5. Start of Frame (SOF)
R
D
CHAPTER 16 CAN CONTROLLER
Figure 16-4. Remote Frame
User’s Manual U17554EJ4V0UD
<5>
Start of frame
<6> <7>
1 bit
<8>
(Arbitration field)
Interframe space
End of frame (EOF)
ACK field
CRC field
Control field
Arbitration field
Start of frame (SOF)
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