MC68HC908AS60MFN MOTOROLA [Motorola, Inc], MC68HC908AS60MFN Datasheet - Page 358
MC68HC908AS60MFN
Manufacturer Part Number
MC68HC908AS60MFN
Description
HCMOS Microcontroller Unit
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908AS60MFN.pdf
(454 pages)
- Current page: 358 of 454
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Byte Data Link Controller-Digital (BDLC-D)
21.7.1 BDLC Analog and Roundtrip Delay
Technical Data
358
NOTE:
Address:
Figure 21-16. BDLC Analog and Roundtrip Delay Register (BARD)
This register programs the BDLC to compensate for various delays of
different external transceivers. The default delay value is 16 s. Timing
adjustments from 9 s to 24 s in steps of 1 s are available. The BARD
register can be written only once after each reset, after which they
become read-only bits. The register may be read at any time.
ATE — Analog Transceiver Enable Bit
This device does not contain an on-board transceiver. This bit should be
programmed to a logic 0 for proper operation.
RXPOL — Receive Pin Polarity Bit
Reset:
Read:
Write:
The analog transceiver enable (ATE) bit is used to select either the
on-board or an off-chip analog transceiver.
The receive pin polarity (RXPOL) bit is used to select the polarity of
an incoming signal on the receive pin. Some external analog
transceivers invert the receive signal from the J1850 bus before
feeding it back to the digital receive pin.
Freescale Semiconductor, Inc.
For More Information On This Product,
1 = Select on-board analog transceiver
0 = Select off-chip analog transceiver
1 = Select normal/true polarity; true non-inverted signal from the
0 = Select inverted polarity, where an external transceiver inverts
Byte Data Link Controller-Digital (BDLC-D)
$003B
Bit 7
ATE
J1850 bus; for example, the external transceiver does not
invert the receive signal
the receive signal from the J1850 bus
1
Go to: www.freescale.com
= Unimplemented
RXPOL
6
1
5
0
0
4
0
0
BO3
3
0
MC68HC908AS60 — Rev. 1.0
BO2
2
1
BO1
1
1
MOTOROLA
Bit 0
BO0
1
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