MC68HC705X32CFU Freescale Semiconductor, MC68HC705X32CFU Datasheet - Page 72

• Manufacturer Part Number: MC68HC705X32CFU
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC705X32CFU

• Cpu Family: HC05
• Device Core Size: 8b
• Frequency (max): 4MHz
• Interface Type: SCI
• Program Memory Type: EPROM
• Program Memory Size: 32KB
• Total Internal Ram Size: 528Byte
• # I/os (max): 32
• Number Of Timers - General Purpose: 1
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• On-chip Adc: 8-chx8-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 64
• Package Type: PQFP
• Lead Free Status / Rohs Status: Supplier Unconfirmed

5
5.3.3
This is a read only register; only the MCAN can change its contents.
BS — Bus status
This bit is set (off-bus) by the MCAN when the transmit error counter reaches 256. The MCAN will
then set RR and will remain off-bus until the CPU clears RR again. At this point the MCAN will wait
for 128 successive occurrences of a sequence of 11 recessive bits before clearing BS and
resetting the read and write error counters. While off-bus the MCAN does not take part in bus
activities.
ES — Error status
TS — Transmit status
RS — Receive status
MCAN status
(CSTAT)
1 (set)
0 (clear) –
1 (set)
0 (clear) –
1 (set)
0 (clear) –
1 (set)
0 (clear) –
MCAN status register (CSTAT)
Address
$0022
–
–
–
–
Freescale Semiconductor, Inc.
CPU warning limit of 96.
otherwise it is in receive mode.
arbitration during transmission.
otherwise it is in transmit mode.
Off-bus – The MCAN is not participating in bus activities.
On-bus – The MCAN is operating normally.
Error – Either the read or the write error counter has reached the
Neither of the error counters has reached 96.
Transmit – The MCAN has started to transmit a message.
Idle – If the receive status bit is also clear then the MCAN is idle;
Receive – The MCAN entered receive mode from idle, or by losing
Idle – If the transmit status bit is also clear then the MCAN is idle;
bit 7
BS
For More Information On This Product,
MOTOROLA CAN MODULE (MCAN)
bit 6
ES
Go to: www.freescale.com
bit 5
TS
bit 4
RS
bit 3
TCS
TBA
bit 2
bit 1
DO
RBS
bit 0
Reset condition
External reset 0000 1100
RR bit set
MC68HC05X16
uu00 1100
on reset
State
Rev. 1