UPD17073 NEC, UPD17073 Datasheet - Page 184
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UPD17073
Manufacturer Part Number
UPD17073
Description
4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM
Manufacturer
NEC
Datasheet
1.UPD17073.pdf
(226 pages)
- Current page: 184 of 226
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184
LCD segment
PLL frequency
synthesizer
Crystal
oscillator circuit
Pin function
LCD14
LCD0
VCOL
VCOH
EO
X
X
IN
OUT
Table 19-2. Pin Status in Halt and Clock Stop Statuses and Notes (2/2)
|
Pin symbol
When these pins are used as general-purpose
output port pins, the same points as those of
the general-purpose output port described
above must be observed.
Current consumption increases when PLL
operates.
When PLL is disabled,
When CE pin goes low, PLL is automatically
disabled.
Current consumption changes with waveform
oscillated by crystal oscillator circuit.
The greater the oscillation amplitude, the
lower the current consumption.
Oscillation amplitude is varied depending on
crystal resonator and load capacitor, and
therefore must be evaluated.
VCOL, VCOH : floated
EO
Halt status
: floated
Pin status and note on processing
All pins are specified as LCD segment signal
output pins and output low levels (display
off).
PLL is disabled.
Each pin is as follows:
X
outputs high level
IN
VCOL, VCOH : floated
EO
pin is internally pulled down and X
Clock stop status
: floated
PD17072,17073
OUT
pin
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