![](http://datasheet.mmic.net.cn/Freescale-Semiconductor/MC68F375MZP33R2_datasheet_98733/MC68F375MZP33R2_212.png)
MC68F375
QUEUED ANALOG-TO-DIGITAL CONVERTER MODULE-64
MOTOROLA
REFERENCE MANUAL
Rev. 25 June 03
5-36
5.12.3 Port A/B Data Register
QADC64 ports A and B are accessed through two 8-bit port data registers (PORTQA
and PORTQB).
QADC64INT — QADC64 Interrupt Register
0xYF F404
MSB
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
LSB
0
Re-
served
IRL1
Re-
served
IRL2
IVB
RESET:
0
Table 5-8 QADC64INT Bit Settings
Bit(s)
Name
Description
15
—
Reserved
14:12
IRL1
Interrupt level for queue 1. A value of 00000 provides an interrupt level of 0; 0b111 provides a
level interrupt. All interrupts are presented on the IMB3. Interrupt level priority software deter-
mines which level has the highest priority request.
11
—
Reserved
10:8
IRL2
Interrupt level for queue 2. A value of 00000 provides an interrupt level of 0; 0b111 provides a
level interrupt. All interrupts are presented on the IMB3. Interrupt level priority software deter-
mines which level has the highest priority request.
7:0
IVB
Interrupt vector base. Initialization software inputs the upper six IVB bits in the interrupt register.
During interrupt arbitration, the vector provided to the bus master by the QADC is made up of the
upper six IVB bits , plus two low-order bits provided to the QADC to identify one of four QADC
interrupt requests. The interrupt vector number is independent of the interrupt level and the inter-
rupt arbitration number. A 0x0F vector number corresponds to the uninitialized interrupt vector.
After reset, the lower byte of the interrupt register reads as 0x0F. Once the IVB field is written,
the two least significant bits always read as zeros.
PORTQA — Port QA Data Register
0xYF F406
PORTQB — Port QB Data Register
MSB
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
LSB
0
PQA7
PQA6
PQA5
PQA4
PQA3
PQA2
PQA1
PQA0
PQB7
PQB6
PQB5
PQB4
PQB3
PQB2
PQB1
PQB0
RESET:
U
UUUU
ANALOG CHANNEL:
AN59
AN58
AN57
AN56
AN55
AN54
AN53
AN52
AN51
AN50
AN49
AN48
AN3
AN2
AN1
AN0
MULTIPLEXED ADDRESS OUTPUTS:
MA2
MA1
MA0
MULTIPLEXED ANALOG
INPUTS:
ANz
ANy
ANx
ANw
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.