MB90F654A FUJITSU [Fujitsu Component Limited.], MB90F654A Datasheet - Page 41
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MB90F654A
Manufacturer Part Number
MB90F654A
Description
16-bit Proprietary Microcontroller
Manufacturer
FUJITSU [Fujitsu Component Limited.]
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4. A/D Converter
• Conversion time: Minimum of 5.2 s per channel (for a 16 MHz machine clock)
• Uses RC-type successive approximation conversion with a sample and hold circuit.
• 10-bit resolution
• Eight program-selectable analog input channels
• An A/D conversion completion interrupt request to the CPU can be generated on the completion of A/D
• Activation by software, external trigger (falling edge), or timer (rising edge) can be selected.
(1) Register Configuration
The A/D converter converts analog input voltages to digital values. The A/D converter has the following features.
Control status register 1 (ADCS1)
Control status register 2 (ADCS2)
Data register 1 (ADCR1)
Data register 2 (ADCR2)
conversion. This interrupt can activate I
for continuous operation.
Single conversion mode:
Scan conversion mode:
Continuous conversion mode : Repeatedly convert specified channels.
Stop conversion mode:
R/W
R
X
Address : 000036
Address : 000037
Address : 000038
Address : 000039
: Readable and writable
: Read only
: Indeterminate
H
H
H
H
Selectively convert a one channel.
Continuously convert multiple channels. Maximum of 8 program-
Convert one channel then halt until the next activation. (Enables
selectable channels.
synchronization of the conversion start timing.)
bit 15
2
OS to transfer the result of A/D conversion to memory and is suitable
BUSY
bit 15
R/W
bit 15
MD1
R/W
bit 7
bit 7
—
7
R
R
MD0
R/W
bit 14
bit 14
R/W
bit 6
INT
bit 6
ADCR2
—
ADCS2
R
R
6
8 bits
ANS2 ANS1 ANS0 ANE2 ANE1 ANE0
INTE
bit 13
R/W
bit 13
R/W
bit 5
bit 5
—
5
R
R
PAUS STS1
bit 12
R/W
bit 12
R/W
bit 4
bit 4
bit 8 bit 7
—
4
R
R
bit 11
bit 11
R/W
R/W
bit 3
bit 3
—
3
R
R
MB90650A Series
STS0 STRT
bit 10
bit 10
R/W
R/W
bit 2
bit 2
ADCS1
ADCR1
—
2
R
R
8 bits
R/W
bit 1
R/W
bit 9
bit 1
bit 9
1
R
9
R
R/W
bit 0
bit 8
bit 0
bit 8
R/W
DA
0
8
R
R
bit 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
XXXXXXXX
XXXXXXXX
Initial value
Initial value
Initial value
Initial value
B
B
B
B
41
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