MC9S12HZ256 Datasheet, PDF(94/692 Page) Freescale Semiconductor, Inc – HCS12 Microcontrollers

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MC9S12HZ256 Datasheet, PDF (94/692 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

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Chapter 2 256 Kbyte Flash Module (FTS256K2V1)

Table 2-21. Flash Interrupt Sources

Interrupt Source

Interrupt Flag

Local Enable

Global (CCR) Mask

Flash address, data and command buffers empty CBEIF (FSTAT register) CBEIE (FCNFG register)

I Bit

All Flash commands completed

CCIF (FSTAT register) CCIE (FCNFG register)

I Bit

NOTE

Vector addresses and their relative interrupt priority are determined at the

MCU level.

2.8.1 Description of Flash Interrupt Operation

The logic used for generating interrupts is shown in Figure 2-29.

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.

Block 0 CBEIF

Block 0 Select

Block 1 CBEIF

Block 1 Select

Block 0 CCIF

Block 0 Select

Block 1 CCIF

Block 1 Select

CBEIE

Flash Command

Interrupt Request

CCIE

Figure 2-29. Flash Interrupt Implementation

For a detailed description of the register bits, refer to Section 2.3.2.4, âFlash Conï¬guration Register

(FCNFG)â and Section 2.3.2.7, âFlash Status Register (FSTAT)â.

MC9S12HZ256 Data Sheet, Rev. 2.04

94

Freescale Semiconductor

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