UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 388

• 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

388
<8> Interframe space
R
D
(a) Error active node
(b) Error passive node
The interframe space consists of a 3-bit intermission field and a bus idle field.
The interframe space consists of an intermission field, a suspend transmission field, and a bus idle field.
Usually, the intermission field is 3 bits. If the transmitting node detects a dominant level at the third bit of
the intermission field, however, it executes transmission.
The interframe space is inserted after a data frame, remote frame, error frame, or overload frame to
separate one frame from the next.
- The bus state differs depending on the error status.
Remarks 1. Bus idle: State in which the bus is not used by any node.
Remarks 1. Bus idle:
(Frame)
R
D
2. D: Dominant = 0
2. D: Dominant = 0
R: Recessive = 1
Suspend transmission: Sequence of 8 recessive-level bits transmitted from the node in
R: Recessive = 1
(Frame)
Intermission
Figure 16-14. Interframe Space (Error Passive Node)
Figure 16-13. Interframe Space (Error Active Node)
(3 bits)
CHAPTER 16 CAN CONTROLLER
Intermission
User’s Manual U17554EJ4V0UD
(3 bits)
Interframe space
State in which the bus is not used by any node.
the error passive status.
Suspend transmission
Interframe space
(8 bits)
(0 to
Bus idle
bits)
(0 to
Bus idle
(Frame)
bits)
(Frame)