UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 380

• 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

16.1.3 Configuration
380
Interrupt request
INTWUP0
INTREC0
INTERR0
INTTRX0
The CAN controller is composed of the following four blocks.
(1) NPB interface
(2) MAC (Memory Access Controller)
(3) CAN protocol layer
(4) CAN RAM
This functional block provides an NPB (NEC peripheral I/O bus) interface and means of transmitting and
receiving signals between the CAN module and the host CPU.
This functional block controls access to the CAN protocol layer and to the CAN RAM within the CAN module.
This functional block is involved in the operation of the CAN protocol and its related settings.
This is the CAN memory functional block, which is used to store message IDs, message data, etc.
interface
CPU
NPB
(Message Control Module)
Message
Figure 16-1. Block Diagram of CAN Module
buffer 0
Message
buffer 1
Message
buffer 2
Message
Message
buffer 15
CAN module
buffer 3
CAN RAM
(NEC Peripheral I/O Bus)
CHAPTER 16 CAN CONTROLLER
MCM
User’s Manual U17554EJ4V0UD
NPB
C0MASK1
C0MASK2
C0MASK3
C0MASK4
Protocol
Layer
CAN
CTxD
CRxD
transceiver
CAN
CAN_H0
CAN_L0
CAN bus