MC68HC812A4 Datasheet, PDF (20/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

List of Figures
Figure
Title
Page
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6-13
Port A Data Register (PORTA) . . . . . . . . . . . . . . . . . . . . . . . . .96
Port A Data Direction Register (DDRA) . . . . . . . . . . . . . . . . . .96
Port B Data Register (PORTB) . . . . . . . . . . . . . . . . . . . . . . . . .97
Port B Data Direction Register (DDRB) . . . . . . . . . . . . . . . . . .97
Port C Data Register (PORTC). . . . . . . . . . . . . . . . . . . . . . . . .98
Port C Data Direction Register (DDRC) . . . . . . . . . . . . . . . . . .99
Port D Data Register (PORTD). . . . . . . . . . . . . . . . . . . . . . . .100
Port D Data Direction Register (DDRD) . . . . . . . . . . . . . . . . .101
Port E Data Register (PORTE) . . . . . . . . . . . . . . . . . . . . . . . .102
Port E Data Direction Register (DDRE) . . . . . . . . . . . . . . . . .103
Port E Assignment Register (PEAR) . . . . . . . . . . . . . . . . . . .104
Pullup Control Register (PUCR) . . . . . . . . . . . . . . . . . . . . . . .107
Reduced Drive Register (RDRIV) . . . . . . . . . . . . . . . . . . . . . .108
7-1 EEPROM Block Protect Mapping . . . . . . . . . . . . . . . . . . . . . .113
7-2 EEPROM Module Configuration Register (EEMCR) . . . . . . .114
7-3 EEPROM Block Protect Register (EEPROT) . . . . . . . . . . . . .115
7-4 EEPROM Test Register (EEPROT) . . . . . . . . . . . . . . . . . . . .116
7-5 EEPROM Programming Register (EEPROG) . . . . . . . . . . . .117
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8-15
Chip-Selects CS3–CS0 Partial Memory Map . . . . . . . . . . . . .125
Memory Expansion and Chip-Select Example . . . . . . . . . . . .127
Chip-Select with No Stretch . . . . . . . . . . . . . . . . . . . . . . . . . .128
Chip-Select with One-Cycle Stretch . . . . . . . . . . . . . . . . . . . .128
Chip-Select with 2-Cycle Stretch . . . . . . . . . . . . . . . . . . . . . .129
Chip-Select with 3-Cycle Stretch . . . . . . . . . . . . . . . . . . . . . .129
Port F Data Register (PORTF) . . . . . . . . . . . . . . . . . . . . . . . .130
Port G Data Register (PORTG) . . . . . . . . . . . . . . . . . . . . . . .130
Port F Data Direction Register (DDRF) . . . . . . . . . . . . . . . . .131
Port G Data Direction Register (DDRG) . . . . . . . . . . . . . . . . .131
Data Page Register (DPAGE) . . . . . . . . . . . . . . . . . . . . . . . .132
Program Page Register (PPAGE) . . . . . . . . . . . . . . . . . . . . .132
Extra Page Register (EPAGE) . . . . . . . . . . . . . . . . . . . . . . . .133
Window Definition Register (WINDEF) . . . . . . . . . . . . . . . . . .133
Memory Expansion Assignment Register (MXAR) . . . . . . . . .134
MC68HC812A4 — Rev. 3.0
20
List of Figures
Advance Information
MOTOROLA