LS1020A datasheet(38/71 Pages) FREESCALE

Part #	LS1020A

Description	TWR-LS1021A Reference Manual

PDF	71 Pages

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Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

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38 / 71 page

Architecture

TWR-LS1021A Reference Manual, Rev. 0

Freescale Semiconductor

2-23

2.17

Interrupt controller

The LS1021A / LS1020A MPIC pins are typically connected to a variety of devices, many operating at

differing voltages.

Figure 2-18 shows the interrupt architecture.

Figure 2-17. Interrupt architecture

The connection from external interrupts to the correct MPIC pins is shown in Table 2-16.

Table 2-16. Interrupt connections

Signal names

Connected devices

Note

IRQ0_B

SGMII2 Interrupt

+1.8V O1VDD, pull-up on board

IRQ1_B

RGMII Interrupt

+1.8V OVDD, Pull-up on board

IRQ2_B

TWR ELEV D62 pin

LCD_IRQ_I interrupt

L1VDD, without pull-up on board for TWR-LCD

interrupt

IRQ3_B

TWR ELEV D60 pin

LCD_IRQ_K interrupt

LVDD, pull-up on board for TWR-LCD interrupt

IRQ4_B

TWR ELEV B61 pin

IRQ_SPI interrupt

+3.3V DVDD, without pull-up on board.

IRQ5_B

TWR ELEV B62 pin

IRQ_KBI interrupt

+3.3V DVDD, without pull-up on board.

LS1020A Datasheet(PDF) 38 Page - Freescale Semiconductor, Inc