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
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）
- High-speed system clock...Selected from the following three sources
- 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 |
|---|---|---|---|---|---|---|---|---|
| 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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