Freescale Semiconductor MPC5604B - Page 631

MPC5604B/C Microcontroller Reference Manual, Rev. 8
620 Freescale Semiconductor
25.4.5.2 Presampling Register (PSR[0..2])
PSR0 = Enable bits of presampling for channel 0 to 15 (precision channels)
PSR1 = Enable bits of presampling for channel 32 to 47 (standard channels)
PSR2 = Enable bits of presampling for channel 64 to 95 (external multiplexed channels)
Table 25-17. PSCR field descriptions
Field Description
PREVAL2 Internal voltage selection for presampling
Selects analog input voltage for presampling from the available two internal voltages (external
multiplexed channels). See Table 25-4.
PREVAL1 Internal voltage selection for presampling
Selects analog input voltage for presampling from the available two internal voltages (standard
channels). See Ta bl e 2 5-4.
PREVAL0 Internal voltage selection for presampling
Selects analog input voltage for presampling from the available two internal voltages (precision
channels). See Ta bl e 2 5-4.
PRECONV Convert presampled value
If bit PRECONV is set, presampling is followed by the conversion. Sampling will be bypassed and
conversion of presampled data will be done.
Address: Base + 0x0084 Access: User read/write
0123456789101112131415
R0000000000000000
W
Reset0000000000000000
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R
PRES
15
PRES
14
PRES
13
PRES
12
PRES
11
PRES
10
PRES
9
PRES
8
PRES
7
PRES
6
PRES
5
PRES
4
PRES
3
PRES
2
PRES
1
PRES
0
W
Reset0000000000000000
Figure 25-23. Presampling Register 0 (PSR0)