O

operating frequency 4, 6 operating voltage 3 oscillator characteristics 267 output drive 11

outputs, DC characteristics 263

P

pad operation 183

pad pulldown characteristics 263 pad pullup characteristics 263 peripheral page burst size 124 PHY interface 3

PHY mode and NS7520 pins 167 PHY Support register 188

PLL 48

PLL Control register 57

PLL mode hardware configuration 52 PLL Settings register 54

PMD devices 3

PORTA inputs 76 outputs 76 PORTA0 76 PORTA2 76 PORTA4 76 readback 76

PORTA Configuration register 74

PORTC inputs 79

level-sensitive interrupts 80 outputs 79

PORTC0 80

PORTC4 80 readback 80

PORTC Configuration register 77

PORTC interrupts 41 power 3

power supply 28

prefetch abort exception 32, 35 processor interrupts vs. DMA 215 programmable timers 2, 4

R

read-to-write operations 129

receive buffer descriptor selector 152 receive buffer size selection 152 receive FIFO 151

receive FIFO interface 215

recommended DC operating conditions 262

register hash table 202-207 REJECT_ signal 153

reset circuit sources 59 reset exception 32, 34 reset timing 270 RPSF_ signal 153

S

SAL 155

SDRAM 86, 111-124 7520 interconnect 112 A10/AP support 116 command definitions 117 read cycles 120 SDRAM Mode register 119 write cycles 122

x16 configuration 113

x32 configuration 112

x8 configuration 115 SDRAM Mode register 119

I n d e x - 7

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Image 327
Digi NS7520 manual PORTC0