NEC PD78F9488 Manuale Utente

 

User’s Manual  U15331EJ4V1UD 

•  ROM and RAM capacities 

Item Data 

Memory 

 
Part Number 

Program Memory 

(ROM) 

Internal RAM 

LCD Display RAM 

µ

PD789488 Mask 

ROM 

µ

PD78F9488 Flash 

memory 

32 KB 

1024 bytes 

28 

× 4 bits 

µ

PD789489 

Mask ROM 

1536 bytes 

 

µ

PD78F9489 Flash 

memory 

48 KB 

 

 

 

•  Minimum instruction execution time can be selected from high speed (0.4 

µ

s: @5.0 MHz operation with main 

system clock), low speed (1.6 

µ

s: @5.0 MHz operation with main system clock), and ultra low speed (122 

µ

s: 

@32.768 kHz operation with subsystem clock) 

•  A circuit to multiply the subsystem clock by 4 is selectable (15.26 

µ

s: @131 kHz operation: 32.768 kHz subsystem 

clock 

× 4) 

•  I/O ports: 45 (N-ch open-drain: 4) 
•  Timer: 6 channels  
•  Serial interface: 2 channels 
•  10-bit resolution A/D converter: 8 channels 
•  LCD controller/driver (on-chip voltage booster) 
  Segment signals: 28, common signals: 4 
•  On-chip multiplier: 8 bits × 8 bits = 16 bits 
•  On-chip infrared remote controller receiver (

µ

PD789489, 78F9489 only) 

•  On-chip key return signal detector 
•  Supply voltage: V

DD

 = 1.8 to 5.5 V 

 
 

CD radio-cassette players, portable audio, compact cameras, healthcare equipment, etc.