pc87591l National Semiconductor Corporation, pc87591l Datasheet - Page 217

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

Revision 1.07
Embedded Controller Modules
Voltage Level Data Buffer - Input 0 through 7 (VOLDAT0-7)
This register holds the voltage level measurement result for inputs 0 through 7.
Location: 00 FD50
Type: RO
4.14.6 Usage Hints
Voltage Level Burst
The total duration of the Voltage Level Burst measurement is a function of the system clock frequency (see Section 4.18 on
page 239) and the data sampling delay, selected by SMPDLY field in ACMTIM register. The values in Table 28 should only
be used to evaluate the maximum duration of the measurement. Actual duration may be shorter, depending on the input
level value. The software should use either EOMEV flag polling or the ACM interrupt, as described in Section 4.14.4 on
page 210.
Bit
Name
5-0
7-6
Bit
VOLTLVL (Voltage Level Data). Voltage level of the respective input i (KBSINi for i 0 through 7), while operating
in Voltage Level Burst mode (ACMMOD = 01
1 LSB = V
Reserved.
00 FD52
00 FD54
00 FD56
00 FD58
00 FD5A
00 FD5C
00 FD5E
CC
16
16
16
16
16
7
16
16
16
System Clock Frequency
/64; the input voltage is calculated as: V
Reserved
- Input 0
- Input 1
- Input 2
- Input 3
- Input 4
- Input 5
- Input 7
- Input 6
(MHz)
10
20
6
4
Table 28. Voltage Level Burst Duration
(Continued)
5
SMPDLY Setting
2
in ACMCNF register). The readout is an unsigned value with
Description
000
010
101
217
4
IN
= VOLTVL
3
Maximum Burst Duration
VOLTLVL
*
(V
CC
/64).
( s)
176
140
118
2
1
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