The UPD79F7023/7024 are OPA: 2ch, CMP: 1ch and 20pin SSOP products.

These products are most suitable for smoke sensor, fire detector and accessory household appliances.

Pin Count / Memory Size Lineup

UPD79F7023/7024-Pin Count / Memory Size Lineup

Block Diagram

Key Features

  • 78K0 CPU core
  • I/O ports,ROM and RAM capacities
Products/Item I/O ports Program Memory
(Flash Memory)
Data Memory
(Internal High-Speed RAM)
μPD79F7023 16(CMOS I/O:13,CMOS input :3) 8 KB 512 bytes
μPD79F7024 16 KB 768 bytes
  • Low power consumption
    • Internal high-speed oscillation mode: 140 μA (TYP.) (at fCPU = 1 MHz operation)
    • STOP mode : 2.0 μA(TYP.)(at VDD = 5.0 V)
  • Clock
    • High-speed system clock...Selected from the following three sources
      • Ceramic/crystal oscillator : 1 to 10MHz
      • External clock : 1 to 10MHz
      • Internal high-speed oscillator: 4MHz ± 3 %(TA = −40 to+85°C),4 MHz ± 2 %(TA = −20 to+70 °C)
  • Low-speed system oscillator 240kHz ± 10 % ...Watchdog timer, time clock in intermittent operation
  • Power-on-clear (POC) circuit
  • Low-voltage detector (LVI) (An interrupt/reset (selectable) is generated when the detection voltage is reached))
    • Detection voltage: Selectable from eleven levels between 2.7 and 4.24 V
  • Single-power-supply flash memory
    • Flash self programming enabled
    • Software protection function: Protected from outside party copying (no flash reading command)
  • Safety function
    • Watchdog timer operated by clock independent from CPU...A hang-up can be detected even if the system clock stops
    • Supply voltage drop detectable by LVI...Appropriate processing can be executed before the supply voltage drops below the operation voltage
    • Equipped with option byte function...Important system operation settings set in hardware
  • Timer
    • 16 bit timer/event counter...PPG output, capture input, external event counter input
    • 8 bit timer H …PWM output, operable with low-speed internal oscillation clock
    • 8 bit timer/event counter 5 …External event counter input
    • Watchdog timer …Operable with low-speed internal oscillation clock
Product/Item 16 bit timer/Event counter 8 bit timer Watchdog timer
μPD79F7023 1 ch Timer H:1 ch 1  ch
μPD79F7024 Timer 5:1 ch
  • Serial interface
    • UART... Asynchronous 2-wire serial interface
Product/Item UART
μPD79F7023 1 ch
μPD79F7024
  • 8 bit resolution A/D conversion: 5 ch
  • Operational amplifier: 2 ch
  • Compiler: 1 ch
  • On-chip debug function …Available to control for the target device, and to reference memory
  • Assembler and C language supported
  • Development tools...Support for simplified emulator (MINICUBE2)
  • Power supply voltage: VDD = 2.7 to 5.5 V
  • Operating ambient temperature:TA =–40 to +85°C

Outline of Functions

Item μPD79F7023 μPD79F7024
Internal Memory Flash memory
(self-programming supported)
8 KB 16 KB
High-speed RAM 512 bytes 768 bytes
Memory space 64 KB
Clock
Main High-speed system
(crystal/ceramic oscillation,
external clock input)
1 to 10 MHz:VDD = 2.7  to 5.5 V
Internal high-speed oscillation 4 MHz ± 3% (TA = −40 to+85 °C), 4 MHz ± 2 % (TA = −20 to+70 °C)
Iternal low-speed oscillation 240 kHz ± 10%
General-purpose registers 8 bits × 32 registers (8 bits × 8 registers × 4 banks)
Instruction set 8-bit operation, 16-bit operation
Multiply/divide (8 bits × 8 bits, 16 bits ÷ 8 bits)
Bit manipulate (set, reset, test, and Boolean operation)
BCD adjust, etc.
I/O ports (total) 16
CMOS I/O 15
CMOS input 1
Timer
16 bits (TMO) 1 ch(PPG output:1,capture input:2)
8 bits (TM5) 1 ch
8 bits (TMH) 1 ch(PWM output:1)
Watchdog (WDT) 1 ch
Serial interface UART 1 ch
8-bit A/D converter
AVREF = 2.7 to 5.5 V
5 ch
Operational amplifier
(Products with operational amplifier)
2 ch (VDD = 2.2 to 5.5 V)
Comparator 1 ch
Vectored interrupt Internal sources External 3
Internal 8
Reset Reset using RESET pin
Internal reset by watchdog timer
Internal reset by power-on-clear
Internal reset by low-voltage detector
On-chip debug function Provided
Power supply voltage VDD = 2.7 to 5.5 V
Operating ambient temperature TA = –40 to +85°C
Package
20-pin plastic SSOP (7.62 mm (300))

Key Applications

Smoke, fire detector, accessory household appliance.

Product Lineup

Document Part No Program Memory
(KB)
RAM
(B)
Operating Voltage Min
(V)
Package Code Production
Packing /Lead Free Order Part No
PDF UPD79F07023MC-CAA-AX 8 512 2.7 PLSP0020JC-B
20-pin plastic
SSOP(6.1x6.5)
Mass production
Tray/Lead free
(Ni/Pd/Au)
UPD79F7023MC-CAA-AX
UPD79F7024MC-CAA-AX 16 768 UPD79F7024MC-CAA-AX
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