Motorola ColdFire MCF5281 - Manual (Page 564)

Queued Analog-to-Digital Converter (QADC)
28-26 Freescale Semiconductor
Table 28-15. Input Sample Times
IST[1:0] Input Sample Times
00 Input sample time = QCLK period
×
2
01 Input sample time = QCLK period
×
4
10 Input sample time = QCLK period
×
8
11 Input sample time = QCLK period
×
16
Table 28-16. Non-Multiplexed Channel Assignments and Signal Designations
Non-Multiplexed Input Signals
Channel Number
1
in CCW CHAN Field
1 All channels not listed are reserved or unimplemented and return undefined results.
Port Signal Name Analog Signal Name
Other
Functions
Signal Type Binary Decimal
PQB0
PQB1
PQB2
PQB3 AN0
AN1
AN2
AN3 —
—
—
— Input
Input
Input
Input 000000
000001
000010
000011 0
1
2
3
PQA0
PQA1 AN52
AN53 —
— Input/Output
Input/Output 110100
110101 52
53
PQA3
PQA4 AN55
AN56 ETRIG1
ETRIG2 Input/Output
Input/Output 110111
111000 55
56
V
RL
V
RH
—
Low reference
High reference
—
—
—
(V
RH
–V
RL
)/2
Input
Input
—
111100
111101
111110 60
61
62
— — End-of-Queue Code — 111111 63
Table 28-17. Multiplexed Channel Assignments and Signal Designations
Multiplexed Input Signals
Channel Number
1
in CCW CHAN Field
Port Signal
Name
Analog
Signal Name
Other
Functions
Signal Type Binary Decimal
PQB0
PQB1
PQB2
PQB3 ANW
ANX
ANY
ANZ
—
—
—
— Input
Input
Input
Input 000XX0
000XX1
010XX0
010XX1 0, 2, 4, 6
1, 3, 5, 7
16, 18, 20, 22
17, 19, 21, 23
PQA0
PQA1 —
— MA0
MA1 Output
Output — 52
53
PQA3
PQA4 AN55
AN56 ETRIG1
ETRIG2 Input/Output
Input/Output 110111
111000 55
56
V
RL
V
RH
—
Low Reference
High Reference
—
—
—
(V
RH
–V
RL
)/2
Input
Input
—
111100
111101
111110 60
61
62
— — End-of-Queue Code — 111111 63
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3