UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 528

• Manufacturer Part Number: UPD78F0838
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

15.1.3 Configuration
526
Interrupt request
INTWUP0
INTREC0
INTERR0
INTTRX0
The CAN controller is composed of the following four blocks.
(1) NPB interface
(2) MCM (Message Control Module)
(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 15-1. Block Diagram of CAN Module
buffer 0
Message
buffer 1
Message
buffer 2
Message
Message
buffer 15
CAN module
buffer 3
CAN RAM
Preliminary User’s Manual U19748EJ1V0UD
CHAPTER 15 CAN CONTROLLER
(NEC Peripheral I/O Bus)
MCM
NPB
C0MASK1
C0MASK2
C0MASK3
C0MASK4
Protocol
Layer
CAN
CTxD
CRxD
transceiver
CAN
CAN_H0
CAN_L0
CAN bus