mcf5282 Freescale Semiconductor, Inc, mcf5282 Datasheet - Page 555

• Manufacturer Part Number: mcf5282
• Manufacturer: Freescale Semiconductor, Inc

28.6.6
This subsection describes the QADC status registers.
28.6.6.1 QADC Status Register 0 (QASR0)
QASR0 contains information about the state of each queue and the current A/D conversion. The bits in
this register are read anytime. For flag bits (CF1, PF1, CF2, PF2, TOR1, TOR2), writing a 1 has no effect;
writing a 0 clears the bit. For QS[9:6] and CWP, writes have no effect. Stop mode resets this register.
The end of a queue is identified in the following cases:
Freescale Semiconductor
•
•
When execution is complete on the CCW in the location prior to the one
pointed to by BQ2
When the current CCW contains the end-of-queue code (channel 63) instead of a valid channel
number
Status Registers
MQ2[12:8]
01010
01011
01100
01101
01110
01111
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
11011
11100
11101
11110
11111
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
Table 28-9. Queue 2 Operating Modes (continued)
Interval timer single-scan mode: time = QCLK period x 2
Interval timer single-scan mode: time = QCLK period x 2
Interval timer single-scan mode: time = QCLK period x 2
Interval timer single-scan mode: time = QCLK period x 2
Interval timer single-scan mode: time = QCLK period x 2
Reserved mode
Reserved mode
Software triggered continuous-scan mode
Externally triggered rising edge continuous-scan mode
Externally triggered falling edge continuous-scan mode
Periodic timer continuous-scan mode: time = QCLK period x 2
Periodic timer continuous-scan mode: time = QCLK period x 2
Periodic timer continuous-scan mode: time = QCLK period x 2
Periodic timer continuous-scan mode: time = QCLK period x 2
Periodic timer continuous-scan mode: time = QCLK period x 2
Periodic timer continuous-scan mode: time = QCLK period x 2
Periodic timer continuous-scan mode: time = QCLK period x 2
Periodic timer continuous-scan mode: time = QCLK period x 2
Periodic timer continuous-scan mode: time = QCLK period x 2
Periodic timer continuous-scan mode: time = QCLK period x 2
Periodic timer continuous-scan mode: time = QCLK period x 2
Reserved mode
Operating Modes
Queued Analog-to-Digital Converter (QADC)
13
14
15
16
17
7
8
9
10
11
12
13
14
15
16
17
28-17