S912XHZ512F1VAG Datasheet, PDF(173/978 Page) Freescale Semiconductor, Inc – Covers MC9S12XHZ384, MC9S12XHZ256

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S912XHZ512F1VAG Datasheet, PDF (173/978 Pages) Freescale Semiconductor, Inc – Covers MC9S12XHZ384, MC9S12XHZ256

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Chapter 3 512 Kbyte Flash Module (S12XFTX512K4V3)

Table 3-20. Flash Interrupt Sources

Interrupt Source

Flash Address, Data and Command Buffers empty

All Flash commands completed

Interrupt Flag

CBEIF

(FSTAT register)

CCIF

(FSTAT register)

Local Enable

CBEIE

(FCNFG register)

CCIE

(FCNFG register)

Global (CCR) Mask

I Bit

I Bit

NOTE

Vector addresses and their relative interrupt priority are determined at the

MCU level.

3.8.1 Description of Flash Interrupt Operation

The logic used for generating interrupts is shown in Figure 3-32.

The Flash module uses the CBEIF and CCIF ï¬ags in combination with the CBIE and CCIE enable bits to

generate the Flash command interrupt request.

CBEIF

CBEIE

Flash Command Interrupt Request

CCIF

CCIE

Figure 3-32. Flash Interrupt Implementation

For a detailed description of the register bits, refer to Section 3.3.2.4, âFlash Conï¬guration Register

(FCNFG)â and Section 3.3.2.6, âFlash Status Register (FSTAT)â.

MC9S12XHZ512 Data Sheet, Rev. 1.06

Freescale Semiconductor

173

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