pc87591l National Semiconductor Corporation, pc87591l Datasheet - Page 180

• Manufacturer Part Number: pc87591l
• Description: Lpc Mobile Embedded Controllers
• Manufacturer: National Semiconductor Corporation

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Embedded Controller Modules
ADC Delay Control Register (ADLYCTL)
This register controls the delay between “input switching” and “conversion start” for the voltage and temperature channels.
ADLYCTL is set to A7
Location: 00 FF26
Type: R/W
Bit
Name
Reset
2-0
7-4
Bit
3
VOLDLY (Voltage Channel Delay). Compensates for the settling time of the input interface and externally added
filter (if used). The conversion of the VOLDLY value to delay, in terms of ADC clock cycles, is shown below. To
calculate the required value and the resulting delay time, see Section 4.11.3 on page 173 and “Calculating the
Voltage Channel Delay” on page 186.
VOLDLY Value
Bits
2 1 0:
0 0 1:
0 1 0:
0 1 1:
1 0 0:
1 0 1:
1 1 0:
1 1 1:
Other:
Reserved.
TMPDLY (Temperature Channel Delay). Compensates for the settling time of the input interface and externally
added filter (if used). The conversion of the TMPDLY value to delay, in terms of ADC clock cycles, is shown
below. To calculate the required value and the resulting delay time, see Section 4.11.4 on page 173 and
“Calculating the Temperature Channel Delay” on page 188.
TMPDLY Value
Bits
7 6 5 4 Temperature Channel Delay (ADC Clock Cycles)
0 0 0 1: 32
0 0 1 0: 64
0 0 1 1: 128
0 1 0 0: 256
0 1 0 1: 512
0 1 1 0: 1024
0 1 1 1: 2048
1 0 0 0: 4096
1 0 0 1: 8192
1 0 1 0: 16384 (default)
Other:
16
Voltage Channel Delay (ADC Clock Cycles)
4
8
16
32
64
128
256 (default)
Reserved
Reserved
7
1
16
on reset.
6
0
TMPDLY
(Continued)
5
1
Description
180
4
0
Reserved
3
0
1
2
VOLDLY
1
1
Revision 1.07
0
1