MC68HC812A4 Datasheet, PDF (23/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

List of Figures
Advance Information
MOTOROLA
Figure
Title
Page
13-1
13-2
13-3
13-4
13-5
Multiple Serial Interface Block Diagram . . . . . . . . . . . . . . . . .215
MSI Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .216
Port S Data Register (PORTS) . . . . . . . . . . . . . . . . . . . . . . . .219
Port S Data Direction Register (DDRS) . . . . . . . . . . . . . . . . .220
SPI Control Register 2 (SP0CR2). . . . . . . . . . . . . . . . . . . . . .221
14-1 SCI Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .226
14-2 SCI Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .227
14-3 SCI Data Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .229
14-4 SCI Transmitter Block Diagram . . . . . . . . . . . . . . . . . . . . . . .232
14-5 SCI Receiver Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . .236
14-6 Receiver Data Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . .238
14-7 Start Bit Search Example 1. . . . . . . . . . . . . . . . . . . . . . . . . . .240
14-8 Start Bit Search Example 2. . . . . . . . . . . . . . . . . . . . . . . . . . .240
14-9 Start Bit Search Example 3. . . . . . . . . . . . . . . . . . . . . . . . . . .241
14-10 Start Bit Search Example 4. . . . . . . . . . . . . . . . . . . . . . . . . . .241
14-11 Start Bit Search Example 5. . . . . . . . . . . . . . . . . . . . . . . . . . .242
14-12 Start Bit Search Example 6. . . . . . . . . . . . . . . . . . . . . . . . . . .242
14-13 Slow Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .243
14-14 Fast Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .244
14-15 Single-Wire Operation (LOOPS = 1 and RSRC = 1) . . . . . . .247
14-16 Loop Operation (LOOP = 1 and RSRC = 0) . . . . . . . . . . . . . .248
14-17 SCI Baud Rate Register High (SC0BDH or SC1BDH) . . . . . .249
14-18 SCI Baud Rate Register Low (SC0BDL or SC1BDL) . . . . . . .249
14-19 SCI Control Register 1 (SC0CR1 or SC1CR1). . . . . . . . . . . .250
14-20 SCI Control Register 2 (SC0CR2 or SC1CR2). . . . . . . . . . . .252
14-21 SCI Status Register 1 (SC0SR1 or SC1SR1). . . . . . . . . . . . .254
14-22 SCI Status Register 2 (SC0SR2 or SC1SR2). . . . . . . . . . . . .256
14-23 SCI Data Register High (SC0DRH or SC1DRH) . . . . . . . . . .257
14-24 SCI Data Register Low (SC0DRL or SC1DRL) . . . . . . . . . . .257
15-1
15-2
15-3
15-4
15-5
SPI Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .265
SPI Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .266
Full-Duplex Master/Slave Connections. . . . . . . . . . . . . . . . . .267
Transmission Format 0 (CPHA = 0) . . . . . . . . . . . . . . . . . . . .269
Slave SS Toggling When CPHA = 0. . . . . . . . . . . . . . . . . . . .269
List of Figures
MC68HC812A4 — Rev. 3.0
23