MC68HC08AZ32A Datasheet, PDF (359/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
MSCAN08 Controller (MSCAN08)
Programmer’s Model of Control Registers
BRP5–BRP0 — Baud Rate Prescaler
These bits determine the time quanta (T_q) clock, which is used to build
up the individual bit timing, according toTable 20-7.
Table 20-7. Baud Rate Prescaler
BRP5
0
0
0
0
:
:
1
BRP4
0
0
0
0
:
:
1
BRP3
0
0
0
0
:
:
1
BRP2
0
0
0
0
:
:
1
BRP1
0
0
1
1
:
:
1
BRP0
0
1
0
1
:
:
1
Prescaler Value (P)
1
2
3
4
:
:
64
NOTE: The CBTR0 register can be written only if the SFTRES bit in the
MSCAN08 module control register is set.
20.14.4 MSCAN08 Bus Timing Register 1
Address: $0503
Bit 7
6
5
4
3
2
1
Bit 0
Read:
SAMP
Write:
TSEG22 TSEG21 TSEG20 TSEG13 TSEG12 TSEG11 TSEG10
Reset: 0
0
0
0
0
0
0
0
Figure 20-18. Bus Timing Register 1 (CBTR1)
SAMP — Sampling
This bit determines the number of serial bus samples to be taken per
bit time. If set, three samples per bit are taken, the regular one
(sample point) and two preceding samples, using a majority rule. For
higher bit rates, SAMP should be cleared, which means that only one
sample will be taken per bit.
1 = Three samples per bit⁽¹⁾
0 = One sample per bit
1. In this case PHASE_SEG1 must be at least 2 time quanta.
MC68HC08AZ32A — Rev 1.0
MOTOROLA
MSCAN08 Controller (MSCAN08)
For More Information On This Product,
Go to: www.freescale.com
Technical Data
359