P80C592 Philips Semiconductors, P80C592 Datasheet - Page 43

• Manufacturer Part Number: P80C592
• Description: 8-bit microcontroller with on-chip CAN
• Manufacturer: Philips Semiconductors

Philips Semiconductors
13.5.10 B
The contents of Bus Timing Register 1 defines the length
of the bit period, the location of the sample point and the
number of samples to be taken at each sample point.
Table 47 Bus Timing Register 1 (address 7)
Table 48 Description of the BTR1 bits
1996 Jun 27
BIT SYMBOL
7
6
5
4
3
2
1
0
8-bit microcontroller with on-chip CAN
SAM
SAM
TSEG2.2 Time Segment 1 (TSEG1) and Time Segment 2 (TSEG2).
TSEG2.1
TSEG2.0
TSEG1.3
TSEG1.2
TSEG1.1
TSEG1.0
7
US
T
IMING
TSEG2.2
Sampling. If the bit SAM is:
TSEG1 determines the number of clock cycles per bit period and the location of the sample point
TSEG2 determines the number of clock cycles per bit period and the location of the sample point:
t
t
TSEG2
TSEG1
HIGH (3 samples), then three samples are taken. This is recommended for slow/medium speed
buses (SAE class A and B) where filtering of spikes on the bus-line is beneficial
(see Section 13.5.19.6)
LOW (1 sample), the bus is sampled once.
This is recommended for high speed buses (SAE class C).
R
6
EGISTER
=
=
t
t
SCL
SCL
1(BTR1)
TSEG2.1
4TSEG2.2
8TSEG1.3
5
+
+
2TSEG2.1
TSEG2.0
4TSEG1.2
4
43
+
+
TSEG2.0
2TSEG1.1
This register can be accessed (read/write) if the Reset
Request bit is set HIGH (present).For further information
on bus timing, see Sections 13.5.9 and 13.5.18.
FUNCTION
TSEG1.3
3
+
+
1
TSEG1.0
.
TSEG1.2
2
+
1
.
TSEG1.1
1
Product specification
P8xC592
TSEG1.0
0