Lpc2000

I am trying to get ADC channel-scanning to operate.  The function is 
only available in burst mode.  The following code looks good, but 
only the lowest-order channel is captured.  Any ideas?

---------------------------------------------------
void Adc_Init(void)
{
  ADCR_bit.SEL    = 0x3;    // Sample CH0 & CH1
  ADCR_bit.CLKDIV = (4-1);  // Divide PCLK by 4
  ADCR_bit.BURST  = 1;      // Repetetive sampling
  ADCR_bit.CLKS   = 0;      // Select 11 clocks
  ADCR_bit.PDN    = 1;      // ADC is operational
  ADCR_bit.TEST   = 0;
  ADCR_bit.EDGE   = 0;
  ADCR_bit.START  = 1;      // Start conversion
}
---------------------------------------------------

For the test, CH0=3V and CH1=0V.  The ADDR register always reports 
3V.  More complicated buffering tests with modulated signals also 
yielded the same result.  Both inputs work when in single-channel 
mode.

I also tried writing the configuration register directly, without 
the bit structure. No joy.
ADCR = 0x00210303;  //0000 0000 0010 0001 0000 0011 0000 0011
ADCR = 0x01210303;  // Start

There is a Philips errata that states scanning does not work between 
CH1 and CH2.  As a test, other channels and SEL values were tried 
with the same result; only the lowest channel number is selected.

Has anone gotten the scanning function to work?  Is there an 
undocumented sequence for programming?

Thanks.