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UPD178004A Datasheet(PDF) 4 Page - NEC

No. de Pieza. UPD178004A
Descripción  8-BIT SINGLE-CHIP MICROCONTROLLERS
Descarga  56 Pages
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Fabricante  NEC [NEC]
Página de inicio  http://www.nec.com/
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UPD178004A Datasheet(HTML) 4 Page - NEC

 
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µPD178004A, 178006A, 178016A, 178018A
4
Product name
µPD178004A
µPD178006A
µPD178016A
µPD178018A
Item
PLL frequency
Division mode
Two types
synthesizer
• Direct division mode (VCOL pin)
• Pulse swallow mode (VCOH and VCOL pins)
Reference frequency
7 types selectable by program (1, 3, 5, 9, 10, 25, 50 kHz)
Charge pump
Error out output: 2 (EO0 and EO1 pins Note 1)
Phase comparator
Unlock detectable by program
Frequency counter
• Frequency measurement
• AMIFC pin: for 450-kHz count
• FMIFC pin: for 450-kHz/10.7-MHz count
D/A converter (PWM output)
8-/9-bit resolution
× 3 channels (shared by 8-bit timer)
Standby function
• HALT mode
• STOP mode
Reset
• Reset by RESET pin
• Internal reset by watchdog timer
• Reset by power-ON clear circuit (3-value detection)
• Detection of less than 4.5 V Note 2 (CPU clock: fX)
• Detection of less than 3.5 V Note 2 (CPU clock: fX/2 or less and on power application)
• Detection of less than 2.5 V Note 2 (in STOP mode)
Power supply voltage
• VDD = 4.5 to 5.5 V (with PLL operating)
•VDD = 3.5 to 5.5 V (with CPU operating, CPU clock: fX/2 or less)
•VDD = 4.5 to 5.5 V (with CPU operating, CPU clock: fX)
Package
• 80-pin plastic QFP (14
× 14 mm, 0.65-mm pitch)
Notes 1. The EO1 pin can be set to high impedance for the
µPD178016A and 178018A.
The following shows an application example.
PD178016A
PD178018A
µ
µ
EO0
EO1
VCOH
VCOL
LPF
VCO
To Mixer
LPF : Low path filter
VCO : Voltage controlled oscillator
• To lock to a target frequency at high speed
Setting the EO0 and EO1 pins to error out output improves the output current potential and LPF
voltage control potential.
• Normal state
Setting only the EO0 pin to error out output maintains the LPF stable.
2. These voltage values are maximum values. Reset is actually executed at a voltage lower than these
values.
(2/2)


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