upd17072 Renesas Electronics Corporation., upd17072 Datasheet - Page 110
upd17072
Manufacturer Part Number
upd17072
Description
4-bit Single-chip Microcontroller With Hardware For Digital Tuning System
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD17072.pdf
(226 pages)
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(2) Flowchart of binary search
(A/D converter reference
voltage setting register)
= #1000B
Detect content of A/D
converter reference voltage
setting register
Reset ADCRFSEL3 flag
Reset ADCRFSEL2 flag
Reset ADCRFSEL1 flag
Reset ADCRFSEL0 flag
Set ADCRFSEL2 flag
Set ADCRFSEL1 flag
Set ADCRFSEL0 flag
ADCCMP = 1?
ADCCMP = 1?
ADCCMP = 1?
ADCCMP = 1?
Initial setting
START
END
N
N
N
N
Y
Y
Y
Y
: Select pin to be used.
: Set reference voltage to 1/2V
: Detect reference voltage and,
: if "0", subtract 1/2V
: add both "0" and "1" to 1/4V
: Detect reference voltage and,
: if "0", subtract 1/4V
: add both "0" and "1" to 1/8V
: Detect reference voltage and,
: if "0", subtract 1/8V
: add both "0" and "1" to 1/16V
: Detect reference voltage and,
: if "0", subtract 1/16V
DD
DD
DD
DD
and,
and,
and,
and,
DD
DD
DD
DD
and set reference voltage.
and set reference voltage.
and set reference voltage.
PD17072,17073
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