UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 457

• 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

C0CTRL register.
change one operation mode to another directly; otherwise the operation will not be guaranteed.
not in the interframe space (i.e., frame reception or transmission is in progress), and the CAN module enters the
initialization mode at the first bit in the interframe space (the value of OPMODE[2:0] are changed to 00H). After
issuing a request to change the mode to the initialization mode, read the OPMODE[2:0] bits until their value becomes
000B to confirm that the module has entered the initialization mode (refer to Figure 16-37).
16.8.5 Resetting error counter C0ERC of CAN module
when re-initialization or forced recovery from the bus-off state is made, set the CCERC bit of the C0CTRL register to 1
in the initialization mode. When this bit is set to 1, the CAN module error counter C0ERC and the CAN module
information register C0INFO are cleared to their default values.
OPMODE[2:0] = 00H
and CAN bus is busy.
The transition from the initialization mode to an operation mode is controlled by the bit string OPMODE[2:0] in the
Changing from one operation mode into another requires shifting to the initialization mode in between. Do not
Requests for transition from the operation mode to the initialization mode are held pending when the CAN bus is
If it is necessary to reset the CAN module error counter C0ERC and the CAN module information register C0INFO
OPMODE[2:0] = 00H
and CAN bus is busy.
[Normal operation
mode]
OPMODE[2:0]=01H
[Normal operation
mode with ABT]
OPMODE[2:0]=02H
OPMODE[2:0] = 00H
and interframe space
OPMODE[2:0] = 01H
Figure 16-28. Transition to Operation Modes
OPMODE[2:0] = 02H
GOM = 1
RESET
OPMODE[2:0] = 00H
and interframe space
All CAN modules are
CHAPTER 16 CAN CONTROLLER
in INIT mode and GOM = 0
RESET released
User’s Manual U17554EJ4V0UD
CAN module
channel invalid
OPMODE[2:0] = 03H
INIT mode
OPMODE[2:0] = 00H
[Receive-only mode]
OPMODE[2:0]=03H
EFSD = 1
and GOM = 0
OPMODE[2:0] = 00H
and interframe space
OPMODE[2:0] = 04H
OPMODE[2:0] = 00H
and CAN bus is busy.
OPMODE[2:0] = 00H
and interframe space
[Single-shot mode]
OPMODE[2:0]=04H
OPMODE[2:0] = 00H
and interframe space
OPMODE[2:0] = 05H
OPMODE[2:0] = 00H
and CAN bus is busy.
[Self-test mode]
OPMODE[2:0]=05H
OPMODE[2:0] = 00H
and CAN bus is busy.
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