User’s Manual U18172EJ2V0UD
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 1
KB
µ
PD78F9201 2
KB
µ
PD78F9202 4
KB
128 bytes
O Minimum instruction execution time: 0.2
µ
s (with 10 [email protected] 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:
8 MHz
±
3% (
−
10 to +70
°
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: 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: 4 channels
O On-chip power-on-clear (POC) circuit (A reset is automatically generated when the voltage drops to 2.1 V
±
0.1 V
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
O Assembler and C language supported
O Enhanced development environment
•
Support for full-function emulator (IECUBE), simplified emulator (MINICUBE2), and simulator
<R>