PXAS30 Philips Semiconductors, PXAS30 Datasheet - Page 15

• Manufacturer Part Number: PXAS30
• Description: XA 16-bit microcontroller 32 K/1 K OTP/ROM/ROMless/ 8-channel 8-bit A/D/ low voltage 2.7 V.5.5 V/ I2C/ 2 UARTs/ 16 MB address range
• Manufacturer: Philips Semiconductors

1. These settings provide additional A/D input sampling time, in order to allow accurate readings with a higher external source impedance.
Philips Semiconductors
Table 2. A/D Timing Configuration
NOTE:
2000 Dec 01
0h (0000)
1h (0001)
2h (0010)
3h (0011)
4h (0100)
5h (0101)
6h (0110)
7h (0111)
8h (1000)
9h (1001)
Ah (1010)
Bh (1011)
Ch (1100)
Dh (1101)
Eh (1110)
Fh (1111)
XA 16-bit microcontroller
32 K/1 K OTP/ROM/ROMless, 8-channel 8-bit A/D, low voltage (2.7 V–5.5 V),
I
ADCS
Bit Addressable
Reset Value: 00h
ADCFG
Not bit Addressable
Reset Value: 00h
2
C, 2 UARTs, 16 MB address range
ADCFG 3 0
ADCFG.3–0
BIT
ADCS.7
ADCS.6
ADCS.5
ADCS.4
ADCS.3
ADCS.2
ADCS.1
ADCS.0
BIT
ADCFG.7
ADCFG.6
ADCFG.5
ADCFG.4
ADCFG.3–0
1
1
Address:43Fh
Address:4B9h
SYMBOL
ADCS7
ADCS6
ADCS5
ADCS4
ADCS3
ADCS2
ADCS1
ADCS0
SYMBOL
—
—
—
—
ADCFG
Frequency (MHz)
Max. Oscillator
13.33
16.66
11.11
6.66
22.2
23.3
26.6
10
20
20
30
30
–
–
–
–
FUNCTION
A/D channel 7 select bit.
A/D channel 6 select bit.
A/D channel 5 select bit.
A/D channel 4 select bit.
A/D channel 3 select bit.
A/D channel 2 select bit.
A/D channel 1 select bit.
A/D channel 0 select bit.
FUNCTION
Reserved for future use. Should not be set to 1 by user programs.
Reserved for future use. Should not be set to 1 by user programs.
Reserved for future use. Should not be set to 1 by user programs.
Reserved for future use. Should not be set to 1 by user programs.
A/D timing configuration (see text and table).
MSB
MSB
ADCS7
Figure 3. A/D Timing Configuration Register (ADCFG)
—
Figure 2. A/D Channel Select Register (ADCS)
ADCS6
—
Osc. Clocks
ADCS5
—
100
104
116
108
124
128
132
146
136
152
172
176
72
76
80
96
15
ADCS4
—
Conversion Time
ADCS3
A/D Timing Configuration
sec at max. Osc.
ADCS2
10.81
4.86
5.32
4.81
4.87
4.25
4.56
7.6
7.2
7.2
6.0
5.2
5.8
4.4
4.7
4.4
ADCS1
ADCS0
SU00940
SU00939
LSB
LSB
Preliminary specification
Sampling Time
(Osc. Clocks)
p
10
12
24
14
14
16
18
32
20
20
22
24
4
6
8
8
g
XA-S3