MC68HC05X16 Datasheet, PDF (81/232 Pages) Freescale Semiconductor, Inc – High-density complementary metal oxide semiconductor HCMOS) microcontroller unit

Freescale Semiconductor, Inc.
Normal mode 1
In contrast to biphase mode the bit representation is time invariant and not toggled.
Normal mode 2
For the TX0 pin this is the same as normal mode 1, however the data stream to TX1 is replaced
by the transmit clock. The rising edge of the transmit clock marks the beginning of a bit time. The
clock pulse will be t_SCL long.
Other output control bits
The other six bits in this register control the output driver configurations, to determine the format
of the output signal for a given data value (see Figure 5-6).
5
OCTP0/1 – These two bits control whether the P-type output control transistors are enabled.
OCTN0/1 – These two bits control whether the N-type output control transistors are enabled.
OCPOL0/1 – These two bits determine the driver output polarity for each of the MCAN bus lines
(TX0, TX1).
TP0/1 and TN0/1 – These are the resulting states of the output transistors.
TD – This is the internal value of the data bit to be transferred across the MCAN bus. (A zero
corresponds to a dominant bit, a one to a recessive.)
The actions of these bits in the output control register are as shown in Table 5-5.
Mode
Float
Pull-down
Pull-up
Push-pull
Table 5-5 MCAN driver output levels
TD
OCPOLi OCTPi OCTNi
TPi
TNi
0
0
0
0
Off
Off
1
0
0
0
Off
Off
0
1
0
0
Off
Off
1
1
0
0
Off
Off
0
0
0
1
Off
On
1
0
0
1
Off
Off
0
1
0
1
Off
Off
1
1
0
1
Off
On
0
0
1
0
Off
Off
1
0
1
0
On
Off
0
1
1
0
On
Off
1
1
1
0
Off
Off
0
0
1
1
Off
On
1
0
1
1
On
Off
0
1
1
1
On
Off
1
1
1
1
Off
On
TXi output level
Float
Float
Float
Float
Low
Float
Float
Low
Float
High
High
Float
Low
High
High
Low
MC68HC05X16
MOTOROLA CAN MODULE (MCAN)
For More Information On This Product,
5-19
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