upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 527

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

16.1.3 Configuration
The CAN controller is composed of the following four blocks.
(1)
(2)
(3)
(4)
Remark:
Interrupt request
INTCnWUP
INTCnREC
INTCnERR
INTCnTRX
NPB interface
This functional block provides an NPB (NEC Peripheral I/O Bus) interface and means of transmit-
ting and
receiving signals between the CAN module and the host CPU.
MAC (Memory Access Controller)
This functional block controls access to the CAN protocol layer and to the CAN RAM within the
CAN module.
CAN protocol layer
This functional block is involved in the operation of the CAN protocol and its related settings.
CAN RAM
This is the CAN memory functional block, which is used to store message IDs, message data, etc.
n = 0, 1
interface
CPU
NPB
Figure 16-1: Block Diagram of CAN Module
User’s Manual U16702EE3V2UD00
Message
(Memory Access Controller)
buffer 0
Message
buffer 1
Message
buffer 2
Message
Message
buffer 31
CAN module
buffer 3
CAN RAM
Chapter 16 FCAN Controller
(NEC peripheral I/O bus)
MAC
NPB
CnMASK1
CnMASK2
CnMASK3
CnMASK4
protocol
layer
CAN
CANTXn
CANRXn
transceiver
CAN
CAN_Hn
CAN_Ln
CAN bus
527