MC68376BGMAB20 Freescale Semiconductor, MC68376BGMAB20 Datasheet - Page 408

• Manufacturer Part Number: MC68376BGMAB20
• Description: IC MCU 32BIT 8K ROM 160-QFP
• Manufacturer: Freescale Semiconductor
• Series: M683xxr

Specifications of MC68376BGMAB20

• Core Processor: CPU32
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: CAN, EBI/EMI, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Type: ROMless
• Ram Size: 7.5K x 8
• Voltage - Supply (vcc/vdd): 4.75 V ~ 5.25 V
• Data Converters: A/D 16x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 160-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

CANCTRL1 — Control Register 1
D.10.5 Control Register 1
SAMP — Sampling Mode
LOOP — TouCAN Loop Back
TSYNC — Timer Synchronize Mode
LBUF — Lowest Buffer Transmitted First
PROPSEG[2:0] — Propagation Segment Time
D-90
MOTOROLA
15
0
RESET:
The SAMP bit determines whether the TouCAN module will sample each received bit
one time or three times to determine its value.
The LOOP bit configures the TouCAN to perform internal loop back. The bit stream
output of the transmitter is fed back to the receiver. The receiver ignores the CANRX0
and CANRX1 pins. The CANTX0 and CANTX1 pins output a recessive state. In this
state, the TouCAN ignores the ACK bit to ensure proper reception of its own messag-
es.
The TSYNC bit enables the mechanism that resets the free-running timer each time a
message is received in message buffer 0. This feature provides the means to synchro-
nize multiple TouCAN stations with a special “SYNC” message (global network time).
The LBUF bit defines the transmit-first scheme.
PROPSEG defines the length of the propagation segment in the bit time. The valid pro-
grammed values are 0 to 7. The propagation segment time is calculated as follows:
0 = One sample, taken at the end of phase buffer segment 1, is used to determine
1 = Three samples are used to determine the value of the received bit. The sam-
0 = Internal loop back disabled.
1 = Internal loop back enabled.
0 = Timer synchronization disabled.
1 = Timer synchronization enabled.
0 = Message buffer with lowest ID is transmitted first.
1 = Lowest numbered buffer is transmitted first.
14
0
the value of the received bit.
ples are taken at the normal sample point, and at the two preceding periods of
the S-clock.
13
0
There can be a bit clock skew of four to five counts between different
TouCAN modules that are using this feature on the same network.
12
CANCTRL0
0
11
0
10
0
REGISTER SUMMARY
9
0
8
0
NOTE
SAMP
7
0
LOOP
6
0
TSYNC
5
0
LBUF
4
0
RSVD
3
0
USER’S MANUAL
2
0
PROPSEG[2:0]
MC68336/376
$YFF087
1
0
0
0