general-purpose I/O pinout 21

signal descriptions 23 glueless connection 2 glueless interface 85 GPIO configuration 222 GPIO pins 2, 3

GPIO timing 305

H

hardware initialization GEN module 62 MEM module 86

hardware interrupts 39-41 FIRQ lines 39 interrupt controller 39 IRQ lines 39

I

idle condition 212

IEEE 802.3u standard 149 inputs, DC characteristics 263 internal clock operation 4 internal multiplexer 105

mode 0 106, 107 mode 1 106, 107 interrupt controller 39

interrupt controller registers 81 Interrupt Enable Clear 81 Interrupt Enable register 81 Interrupt Enable Set 81 Interrupt Status Enabled 81 Interrupt Status Raw 81

interrupt enable bits 142 Interrupt Enable Clear register 81

Interrupt Enable register 81 Interrupt Enable Set register 81 interrupt pending bits 142

interrupt request exception. See IRQ exception.

interrupt service routine (ISR) 34 interrupt sources 40-41

DMA interrupts 40

Ethernet receive and transmit interrupts 40

PORTC 41

serial interrupts 40 timer 1 40

timer 2 40

watchdog timer interrupts 40 Interrupt Status Register Enabled 40, 81 Interrupt Status Register Raw 39, 81 interrupts 80-83

IRQ 80

IRQ exception 32, 34, 36 IRQ lines 39

J

JEDEC SDRAM standard 119 JTAG boundary scan testing 48 JTAG test

pinout 26

signal descriptions 26 JTAG timing 298-299

L

Little Endian configuration 215 load mode command 109

I n d e x - 5

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Digi NS7520 manual Portc