Overview Of Functions; Differences Between Standard Quality Grade Products And (A) Products - NEC PD789860 User Manual

1.8 Overview of Functions

Part Number
Item
Internal memory ROM
High-speed RAM
EEPROM
Oscillator
Minimum instruction execution time
General-purpose registers
Instruction set
I/O ports
Timers
Power-on-clear POC circuit
circuit
LVI circuit
Bit sequential buffer
Key return function
Vectored interrupt Maskable
sources
Non-maskable
Power supply voltage
Operating ambient temperature
Package

1.9 Differences Between Standard Quality Grade Products and (A) Products

A more stringent quality assurance program is applied to the
grade product) (NEC Electronics classifies the former as a special quality grade product).
The only difference between the standard quality grade product (
µ
the PD789860 Subseries is the quality grade. The other features (functions and electrical specifications) are the
same.
Table 1-1. Standard Quality Grade Products and (A) Products
Item
Quality grade
Other (functions, electrical specifications, etc.)
µ
CHAPTER 1 GENERAL (
µ
PD789860
µ
PD789860(A)
Mask ROM
4 KB
128 bytes
32 bytes
Ceramic/crystal oscillator
µ
0.4/1.6 s (@5.0 MHz operation with system clock)
8 bits × 8 registers
• 16-bit operations
• Bit manipulations (such as set, reset, and test)
Total:
CMOS I/O:
CMOS input:
• 8-bit timer:
• Watchdog timer:
Generates internal reset signal according to comparison of detection voltage to
power supply voltage
Generates interrupt request signal according to comparison of detection voltage to
power supply voltage
8 bits + 8 bits = 16 bits
Generates key return signal according to falling edge detection
Internal: 5
Internal: 1, external: 1
V = 1.8 to 5.5 V
DD
= −40 to +85°C
T
A
20-pin plastic SSOP (7.62 mm (300))
Part Number Standard Quality Grade Product
µ
PD789860
Standard
Same
User's Manual U14826EJ5V0UD
PD789860 SUBSERIES)
EEPROM
14
10
4
2 channels
1 channel
µ
PD789860(A) than the
µ
PD789860) and (A) product (
Special
µ
PD78E9860A
µ
PD789860 (standard quality
µ
PD789860(A)) in
(A) Product
µ
PD789860(A)
27