UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 456

• 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

Cautions 1. When a message is received, reception filtering is performed in accordance with the ID and mask
16.8.4 Transition from initialization mode to operation mode
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The CAN module can be switched to the following operation modes.
- Normal operation mode
- Normal operation mode with ABT
- Receive-only mode
- Single-shot mode
- Self-test mode
Figure 16-27. Setting Transmission Request (TRQ) to Transmit Message Buffer After Redefining
2. When a message is transmitted, the transmission priority is checked in accordance with the ID,
set to each receive message buffer.
contents of the message buffer after it has been redefined may contradict the result of reception
(result of reception filtering). If this happens, check that the ID and IDE received first and stored
in the message buffer following redefinition are those stored after the message buffer has been
redefined. If no ID and IDE are stored after redefinition, redefine the message buffer again.
IDE, and RTR bits set to each transmit message buffer to which a transmission request was set.
The transmit message buffer having the highest priority is selected for transmission. If the
procedure in Figure 16-41 is not observed, a message with an ID not having the highest priority
may be transmitted after redefinition.
Wait for 1 bit of CAN data.
CHAPTER 16 CAN CONTROLLER
Execute transmission?
Redefinition completed
Clear TRQ = 0
User’s Manual U17554EJ4V0UD
Set TRQ = 1
Set TRQ bit
End
Yes
If the procedure in Figure 16-40 is not observed, the
No