User’s Manual U16898EJ3V0UD
15
CHAPTER 1 OVERVIEW
1.1 Features
O Minimum instruction execution time selectable from high speed (0.2
µ
s) to low speed (3.2
µ
s) (with CPU clock of
10 MHz)
O General-purpose registers: 8 bits
×
8 registers
O ROM and RAM capacities
Item
Part number
Program Memory (Flash Memory)
Memory (Internal High-Speed RAM)
µ
PD78F9221
2 KB
128 bytes
µ
PD78F9222
4 KB
256 bytes
O On-chip power-on clear (POC) circuit and low voltage detector (LVI)
O On-chip watchdog timer (operable on internal low-speed internal oscillator clock)
O I/O ports: 17
O Timer: 4 channels
•
16-bit timer/event counter: 1 channel
•
8-bit timer:
2 channels
•
Watchdog timer:
1 channel
O Serial interface: UART (LIN (Local Interconnect Network) bus supported) 1 channel
O 10-bit resolution A/D converter: 4 channels
O Supply voltage: V
DD
= 2.0 to 5.5 V
Note
O Operating temperature range: T
A
=
−
40 to +85
°
C ((T) product, (S) product, (R) product, (A) product)
T
A
=
−
40 to +125
°
C ((T2) product, (A2) product)
Note
Use this product in a voltage range of 2.2 to 5.5 V because the detection voltage (V
POC
) of the power-on
clear (POC) circuit is 2.1 V
±
0.1 V.
1.2 Application Fields
O Automotive electronics
•
System control of body instrumentation system (such as power windows and keyless entry reception)
•
Sub-microcontroller of control system
O Household appliances
•
Electric toothbrushes
•
Electric shavers
O Toys
O Industrial equipment
•
Sensor and switch control
•
Power tools