MC68HC812A4 Datasheet, PDF (218/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

Multiple Serial Interface (MSI)
Addr.
Register Name
Bit 7
6
5
Read: 0
0
0
SPI 0 Control Register
$00D1
2 (SP0CR2) Write:
See page 275.
Reset: 0
0
0
Read: 0
0
0
SPI 0 Baud Rate
$00D2
Register (SP0BR) Write:
See page 276.
Reset: 0
0
0
Read: SPIF WCOL
0
SPI 0 Status Register
$00D3
(SP0SR) Write:
See page 277.
Reset: 0
0
0
Read:
SPI 0 Data Register
Bit 7
6
5
$00D5
(SP0DR) Write:
See page 278.
Reset:
Read:
Port S Data Register
PS7
PS6
PS5
$00D6
(PORTS) Write:
See page 219.
Reset:
$00D7
Port S Data Direction
Register (DDRS)
See page 220.
Read:
Write:
Reset:
DDRS7
0
DDRS6
0
DDRS5
0
= Unimplemented
4
3
0
PUPS
0
1
0
0
0
0
MODF
0
0
0
4
3
Unaffected by reset
PS4
PS3
Unaffected by rset
DDRS4 DDRS3
0
0
2
RDS
0
SPR2
0
0
0
2
PS2
DDRS2
0
1
0
0
SPR1
0
0
0
1
PS1
DDRS1
0
Bit 0
SPC0
0
SPR0
0
0
0
0
PS0
DDRS0
0
Figure 13-2. MSI Register Map (Sheet 3 of 3)
Full register descriptions can be found in Section 14. Serial
Communications Interface Module (SCI) and Section 15. Serial
Peripheral Interface (SPI).
13.7 General-Purpose I/O Ports
Port S shares its pins with the multiple serial interface (MSI). In all
modes, port S pins PS7–PS0 are available for either general-purpose
I/O or for SCI and SPI functions.
MC68HC812A4 — Rev. 3.0
218
Multiple Serial Interface (MSI)
Advance Information
MOTOROLA