Datasheet
User’s Manual U18172EJ3V0UD
14
CHAPTER 1 OVERVIEW
1.1 Features
O 78K0S CPU core
O ROM and RAM capacities
Item
Part number
Program Memory (Flash Memory) Memory (Internal High-Speed RAM)
μ
PD78F9200, 78F9500 1 KB
μ
PD78F9201, 78F9501 2 KB
μ
PD78F9202, 78F9502 4 KB
128 bytes
O Minimum instruction execution time: 0.2
μ
s (with 10 MHz@4.0 to 5.5 V operation)
O Clock
• High-speed system clock … Selected from the following three sources
- Ceramic/crystal resonator: 2 to 10 MHz
- External clock: 2 to 10 MHz
- High-speed internal oscillator
μ
PD78F920x: 8 MHz ±3% (−10 to +70°C), 8 MHz ±5% (−40 to +85°C)
μ
PD78F950x: 8 MHz ±2% (−10 to +85°C), 8 MHz ±5% (−40 to +85°C)
• Low-speed internal oscillator 240 kHz (TYP.) … Watchdog timer, timer clock in intermittent operation
O I/O ports: 8 (CMOS I/O: 7, CMOS input: 1)
O Timer: 3 channels
• 16-bit timer/event counter
Note
: 1 channel … Timer output × 1, capture input × 2
• 8-bit timer: 1 channel … PWM output × 1
• Watchdog timer: 1 channel … Operable with low-speed internal oscillation clock
O 10-bit resolution A/D converter
Note
: 4 channels
O On-chip power-on-clear (POC) circuit (A reset is automatically generated when the voltage drops to 2.1 V (TYP.)
or below)
O On-chip low voltage detector (LVI) circuit (An interrupt/reset (selectable) is generated when the detection voltage
is reached)
• Detection voltage: Selectable from ten levels between 2.35 and 4.3 V
O Single-power-supply flash memory
• Flash self programming enabled
• Software protection function: Protected from outside party copying (no flash reading command)
• Time required for writing by dedicated flash memory programmer: Approximately 3 seconds (4 KB)
∗ Flash programming on mass production lines supported
O 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
Note
μ
PD78F920x only
<R>
<R>
<R>