S912XHZ512F1VAG Datasheet, PDF (809/978 Pages) Freescale Semiconductor, Inc – Covers MC9S12XHZ384, MC9S12XHZ256

Chapter 23 External Bus Interface (S12XEBIV3)
Refer to the S12X_MMC section for a detailed description of the MCU operating modes.
MC9S12XHZ512 Data Sheet, Rev. 1.06
Freescale Semiconductor
809