MC68HC812A4 Datasheet, PDF (221/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

Multiple Serial Interface (MSI)
General-Purpose I/O Ports
13.7.3 Port S Pullup and Reduced Drive Control
Address: $00D1
Bit 7
6
5
4
3
2
1
Bit 0
Read: 0
0
0
0
0
PUPS RDS
SPC0
Write:
Reset: 0
0
0
0
1
0
0
0
= Unimplemented
Figure 13-5. SPI Control Register 2 (SP0CR2)
Read: Anytime
Write: Anytime
PUPS — Pullup Port S Enable Bit
Setting PUPS enables internal pullup devices on all port S input pins.
If a pin is programmed as output, the pullup device becomes inactive.
1 = Pullups enabled
0 = Pullups disabled
RDS — Reduced Drive Port S Bit
Setting RDS lowers the drive capability of all port S output pins for
lower power consumption and less noise.
1 = Reduced drive
0 = Full drive
Table 13-1. Port S Pullup and Reduced Drive Enable
Register
Pullups
Reduced Drive
Control Pins Reset Control Pins Reset
Bit Affected State Bit Affected State
SPI control register 2
(SP0CR2)
PUPS PS7–PS0 Enabled
RDS
PS7–PS0 Disabled
SPC0 — See Section 14. Serial Communications Interface Module
(SCI).
Advance Information
MOTOROLA
Multiple Serial Interface (MSI)
MC68HC812A4 — Rev. 3.0
221