Table 2—Additional RAM status and control registers are located in the upper part of the MC68HC908Qxx address space. Take a look at $FE00 through $FE0C in addition to $FFBE, $FFC0, and $FFFF.
| Address space | Register |
|
$EE00-$FDFF |
Flash memory (4096 bytes) MC68HC908QT4/Y4 |
| • Unimplemented (2560 bytes) | |
| • Flash memory (1536 bytes) MC68HC908QT1/T2/Y1/Y2 | |
| $FE00 | Break Status register (BSR) |
| $FE01 | Sim Reset Status register (SRSR) |
| $FE02 | Break Auxiliary register (BRKAR) |
| $FE03 | Break Flag Control register (BFCR) |
| $FE04 | Interrupt Status register 1 (INT1) |
| $FE05 | Interrupt Status register 2 (INT2) |
| $FE06 | Interrupt Status register 3 (INT3) |
| $FE07 | (Reserved for) Flash Test Control register (FLTCR) |
| $FE08 | Flash Control register (FLCR) |
| $FE09 | Break Address High register (BRKH) |
| $FE0A | Break Address Low register (BRKL) |
| $FE0B | Break Status and Control register (BRKSCR) |
| $FE0C | Low-Voltage Interrupt Service register (LVISR) |
| $FE0D-$FE0F | Reserved for flash memory test (3 bytes) |
| $FE10-$FFAF | Monitor ROM (416 bytes) |
| $FFB0-$FFBD | Flash memory (14 bytes) |
| $FFBE | Flash Block Protect register (FLBPR) |
| $FFBF | Reserved flash memory |
| $FFC0 | Internal oscillator trim value |
| $FFC1 | Reserved flash memory |
| $FFC2-$FFCF | Flash (14 bytes) |
| $FED0-$FFDD | User vectors (14 bytes) |
| $FEDE | ADC conversion complete vector high |
| $FEDF | ADC conversion complete vector low |
| $FEE0 | Keyboard vector high |
| $FEE1 | Keyboard vector low |
| $FEE2-$FFF1 | User vectors (16 bytes) |
| $FFF2 | TIM overflow vector high |
| $FFF3 | TIM overflow vector low |
| $FFF4 | TIM channel 1 vector high |
| $FFF5 | TIM channel 1 vector low |
| $FFF6 | TIM channel 0 vector high |
| $FFF7 | TIM channel 0 vector low |
| $FFF8-$FFF9 | User vectors (2 bytes) |
| $FFFA | IRQ vector high |
| $FFFB | IRQ vector low |
| $FFFC | SWI vector high |
| $FFFD | SWI vector low |
| $FFFE | Reset vector high |
| $FFFF | (Read) Reset vector low (Write) COP Control register (COPCTL) |