XC912BC32CFU8 Motorola Semiconductor Products, XC912BC32CFU8 Datasheet - Page 261

• Manufacturer Part Number: XC912BC32CFU8
• Description: M68HC12B Family Data Sheet
• Manufacturer: Motorola Semiconductor Products

15.9.7 Port DLC Data Register
M68HC12B Family — Rev. 8.0
MOTOROLA
Alternate Pin Function:
PUPDLC — BDLC Pullup Enable Bit
RDPDLC — BDLC Reduced Drive Bit
Read: Anytime
Write: Anytime
This register holds data to be driven out on port DLC pins or data received from
port DLC pins.
When configured as an input, a read returns the pin level. When configured as
output, a read returns the latched output data.
Writes do not change pin state when the pins are configured for BDLC output.
Upon reset, pins are configured for general-purpose high impedance inputs.
Address: $00FE
Reset:
Read:
Write:
1 = Connects internal pullups to PORTDLC I/O pins
0 = Disconnects internal pullups from PORTDLC I/O pins
1 = Configure PORTDLC I/O pins for reduced drive strength.
0 = Configure PORTDLC I/O pins for normal drive strength.
Figure 15-19. Port DLC Data Register (PORTDLC)
Byte Data Link Communications (BDLC)
Bit 7
0
0
= Unimplemented
Bit 6
U
6
Bit 5
U
5
U = Unaffected
Bit 4
U
4
Byte Data Link Communications (BDLC)
Bit 3
U
3
Bit 2
U
2
DLCTX
Bit 1
BDLC Registers
U
1
Data Sheet
DLCRX
Bit 0
Bit 0
U
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