Reference Guide M68HC11ERG/AD Rev. 2, 10/2003 M68H.
MC68HC11E1 - (MC68HC711E Series) M68HC11E Series Programming Reference Guide
Reference Guide M68HC11ERG/AD Rev. 2, 10/2003 M68HC11E Series Programming Reference Guide Block Diagram MODA/ MODB/ LIR VSTBY XTAL EXTAL E IRQ XIRQ/V.