ATMEGA128-16AU SL383 Atmel, ATMEGA128-16AU SL383 Datasheet - Page 265
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ATMEGA128-16AU SL383
Manufacturer Part Number
ATMEGA128-16AU SL383
Description
Manufacturer
Atmel
Datasheet
1.ATMEGA128-16AU_SL383.pdf
(386 pages)
- Current page: 265 of 386
- Download datasheet (7Mb)
2467S–AVR–07/09
The recommended values from
rithm in
“Actions” describes what JTAG instruction to be used before filling the Boundary-scan Register
with the succeeding columns. The verification should be done on the data scanned out when
scanning in the data on the same row in the table.
Table 105. Algorithm for Using the ADC
Using this algorithm, the timing constraint on the HOLD signal constrains the TCK clock fre-
quency. As the algorithm keeps HOLD high for five steps, the TCK clock frequency has to be at
least five times the number of scan bits divided by the maximum hold time, t
Step
1
2
3
4
5
6
7
8
9
10
11
Table
Actions
SAMPLE_
PRELOAD
EXTEST
Verify the
COMP bit
scanned
out to be 0
Verify the
COMP bit
scanned
out to be 1
105. Only the DAC and Port Pin values of the Scan Chain are shown. The column
ADCEN
1
1
1
1
1
1
1
1
1
1
1
DAC
0x200
0x200
0x200
0x123
0x123
0x200
0x200
0x200
0x143
0x143
0x200
Table 104
MUXEN
0x08
0x08
0x08
0x08
0x08
0x08
0x08
0x08
0x08
0x08
0x08
are used unless other values are given in the algo-
HOLD
1
0
1
1
1
1
0
1
1
1
1
PRECH
1
1
1
1
0
1
1
1
1
0
1
PA3.
Data
0
0
0
0
0
0
0
0
0
0
0
PA3.
Control
0
0
0
0
0
0
0
0
0
0
0
ATmega128
hold,max
PA3.
Pullup_
Enable
0
0
0
0
0
0
0
0
0
0
0
265
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