Datasheet

Section 15 Controller Area Network for Tiny (TinyCAN)
Rev. 4.00 Mar. 15, 2006 Page 296 of 556
REJ09B0026-0400
• Other features
Standby mode can be cleared by falling edge detection of the HRXD pin.
The block diagram of the TinyCAN is shown in figure 15.1.
HTXD
CDLC
Mailboxes
MCn0, MCn4
to MCn7
(n = 0 to 3)
LAFMn
(n = 0 to 3)
Interrupt generator Interrupt request
Port control
MDn0 to
MDn7
(n = 0 to 3)
Temporary
buffer
REC
TEC
BCR0/1
MBCR
TXPR
TXCR
TXACK
ABACK
MCR
GSR
TCR
TCIRR0/1
TCIMR0/1
TCMR
RXPR
RFPR
UMSR
MBIMR
HRXD
[Legend]
MCR:
GSR:
TCR:
TCIRR0/1:
TCIMR0/1:
MBCR:
TXPR:
TXCR:
TXACK:
ABACK:
RXPR:
RFPR:
Master control register
General status register
Test control register
TinyCAN interrupt register 0/1
TinyCAN interrupt mask register 0/1
Mailbox configuration register
Transmit pending register
Transmit pending cancel register
Transmit acknowledge register
Abort acknowlege register
Data frame receive complete register
Remote request register
Unread message status register
Mailbox interrupt mask register
Bit configuration register 0/1
Transmit error counter
Receive error counter
Local acceptance filter mask (n = 0 to 3)
Message control (n = 0 to 3)
Message data (n = 0 to 3)
TinyCAN module control register
CAN data link controller
The CDLC conforms to the Bosch CAN Ver. 2.0B active
standard, and performs transmission and reception
of messages, CRC checking, bus arbitration, etc.
UMSR:
MBIMR:
BCR0/1:
TEC:
REC:
LAFMn:
MCn0, MCn4 to
MCn7:
MDn0 to MDn7:
TCMR:
CDLC:
Internal data bus
Figure 15.1 TinyCAN Block Diagram