PC312XDP512F0CFVR datasheet(786/1348 Pages) FREESCALE

Part #	PC312XDP512F0CFVR

Description	HCS12X Microcontrollers

PDF	1348 Pages

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Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

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786 / 1348 page

Chapter 21 External Bus Interface (S12XEBIV2)

MC9S12XDP512 Data Sheet, Rev. 2.21

788

Freescale Semiconductor

21.1.3

Block Diagram

Figure 21-1 is a block diagram of the XEBI with all related I/O signals.

Figure 21-1. XEBI Block Diagram

21.2

External Signal Description

The user is advised to refer to the SoC section for port configuration and location of external bus signals.

NOTE

The following external bus related signals are described in other sections:

CS2, CS1, CS0 (chip selects) — S12X_MMC section

ECLK, ECLKX2 (free-running clocks) — PIM section

TAGHI, TAGLO (tag inputs) — PIM section, S12X_DBG section

Table 21-1 outlines the pin names and gives a brief description of their function. Refer to the SoC section

and PIM section for reset states of these pins and associated pull-ups or pull-downs.

XEBI

ADDR[22:0]

DATA[15:0]

LSTRB

R/W

UDS

LDS

EWAIT

ACC[2:0]

IQSTAT[3:0]

IVD[15:0]

PC312XDP512F0CFVR Datasheet(PDF) 786 Page - Freescale Semiconductor, Inc