MC68376BGMAB20 Freescale Semiconductor, MC68376BGMAB20 Datasheet - Page 410

• 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: -

TIMER — Free Running Timer Register
PSEG1[2:0] — Phase Buffer Segment 1
PSEG2 — Phase Buffer Segment 2
D.10.8 Free Running Timer
D-92
MOTOROLA
15
0
RESET:
The PSEG1 field defines the length of phase buffer segment 1 in the bit time.
The valid programmed values are 0 through 7.
The length of phase buffer segment 1 is calculated as follows:
The PSEG2 field defines the length of phase buffer segment 2 in the bit time.
The valid programmed values are 0 through 7.
The length of phase buffer segment 2 is calculated as follows:
The free running timer counter can be read and written by the CPU32. The timer starts
from zero after reset, counts linearly to $FFFF, and wraps around.
The timer is clocked by the TouCAN bit-clock. During a message, it increments by one
for each bit that is received or transmitted. When there is no message on the bus, it
increments at the nominal bit rate.
The timer value is captured at the beginning of the identifier field of any frame on the
CAN bus. The captured value is written into the “time stamp” entry in a message buffer
after a successful reception/transmission of a message.
14
0
13
0
12
0
Phase Buffer Segment 1
Phase Buffer Segment 2
11
0
10
0
REGISTER SUMMARY
9
0
8
0
TIMER
=
=
7
0
PSEG1
PSEG2
6
0
+
+
5
0
1
1
Time Quanta
Time Quanta
4
0
3
1
USER’S MANUAL
2
0
MC68336/376
$YFF08A
1
0
0
0