MC68HC912B32MFU8 MOTOROLA [Motorola, Inc], MC68HC912B32MFU8 Datasheet - Page 97

• Manufacturer Part Number: MC68HC912B32MFU8
• Description: 16-Bit Microcontroller
• Manufacturer: MOTOROLA [Motorola, Inc]

DDS0 — Data Direction for Port S Bit 2 and Bit 0
DDS1 — Data Direction for Port S Bit 1
DDS2, DDRS3 — Data Direction for Port S Bit 2 and Bit 3
DDS[6:4] — Data Direction for Port S Bits 6 through 4
DDS7 — Data Direction for Port S Bit 7
PURDS — Pull-Up and Reduced Drive for Port S
RDPS2 — Reduce Drive of PS[7:4]
RDPS1 — Reduce Drive of PS[3:2]
RDPS0 — Reduce Drive of PS[1:0]
PUPS2 — Pull-Up Port S Enable PS[7:4]
PUPS1 — Pull-Up Port S Enable PS[3:2]
PUPS0 — Pull-Up Port S Enable PS[1:0]
MC68HC912B32
MC68HC912B32TS/D
RESET:
If the SCI receiver is configured for two-wire SCI operation, corresponding port S pins will be input re-
gardless of the state of these bits.
If the SCI transmitter is configured for two-wire SCI operation, corresponding port S pins will be output
regardless of the state of these bits.
These bits are for general-purpose I/O only.
If the SPI is enabled and expects the corresponding port S pin to be an input, it will be an input regard-
less of the state of the DDRS bit. If the SPI is enabled and expects the bit to be an output, it will be an
output only if the DDRS bit is set.
In SPI slave mode, DDS7 has no meaning or effect; the PS7 pin is dedicated as the SS input. In SPI
master mode, DDS7 determines whether PS7 is an error detect input to the SPI or a general-purpose
or slave select output line.
Read or write anytime.
0 = Port S output drivers for bits 7 through 4 operate normally.
1 = Port S output pins for bits 7 through 4 have reduced drive capability for lower power and less
0 = Port S output drivers for bits 3 and 2 operate normally.
1 = Port S output pins for bits 3 and 2 have reduced drive capability for lower power and less noise.
0 = Port S output drivers for bits 1 and 0 operate normally.
1 = Port S output pins for bits 1 and 0 have reduced drive capability for lower power and less noise.
0 = No internal pull-ups on port S bits 7 through 4.
1 = Port S input pins for bits 7 through 4 have an active pull-up device. If a pin is programmed as
0 = No internal pull-ups on port S bits 3 and 2.
1 = Port S input pins for bits 3 and 2 have an active pull-up device. If a pin is programmed as output,
0 = No internal pull-ups on port S bits 1 and 0.
1 = Port S input pins for bits 1 and 0 have an active pull-up device. If a pin is programmed as output,
noise.
output, the pull-up device becomes inactive.
the pull-up device becomes inactive.
the pull-up device becomes inactive.
Bit 7
0
0
RDPS2
6
0
RDPS1
5
0
RDPS0
4
0
3
0
0
PUPS2
2
1
PUPS1
1
1
PUPS0
Bit 0
1
MOTOROLA
$00DB
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