AT93C46D.ino

//AT93C46D

#include<SPI.h>
#define DATAOUT 11//MOSI
#define DATAIN  12//MISO 
#define SPICLOCK  13//sck
#define SS 10//ss


void setup()
{
  pinMode(SS,OUTPUT);
  pinMode(DATAOUT, OUTPUT);
  pinMode(DATAIN, INPUT);
  pinMode(SPICLOCK,OUTPUT);
  digitalWrite(SS,LOW);
  
  Serial.begin(9600);

  SPI.beginTransaction(SPISettings(2000000, MSBFIRST, SPI_MODE0));

  fill();

  dump();
}

void loop()
{
 
}

void fill()
{
  Serial.println("Send EWEN opcode");
  digitalWrite(SS,HIGH);
  SPI.transfer(0b1001); //EWEN
  SPI.transfer(0b10000000);
  digitalWrite(SS,LOW);
  
  delay(100);

  for (int i=0; i < 128; i++) {
    digitalWrite(SS,HIGH);
    SPI.transfer(B101);
    SPI.transfer(i & 0x7f);
    SPI.transfer(0b00000000);
    delay(10);
    digitalWrite(SS,LOW);
  }
  
  delay(100);

  Serial.println("Send EWDS opcode");
  digitalWrite(SS,HIGH);
  SPI.transfer(0b1000); //EWDS
  SPI.transfer(0b00000000);
  digitalWrite(SS,LOW);
  
  delay(10);
}

void dump(){
  Serial.println("Dumping AT93C46D");
  
  byte b;

  for (int i=0; i < 128; i++) {
    digitalWrite(SS,HIGH);
    SPI.transfer(0b11); //read opcode
    SPI.transfer(i & 0x7f);
    b = SPI.transfer(0); //clock data out
    digitalWrite(SS,LOW);
    Serial.println(b, BIN);
  }
}

Line 44-45 needs fixing. See stackexchange and product spec. Too many bits.