Outline Of Functions - NEC 78K0 User Manual

1.7

Outline of Functions

Item
Internal memory ROM
High-speed
RAM
Expansion RAM
Buffer RAM
Memory space
X1 input clock (oscillation frequency)
Standard
products, (A)
grade products
(A1) grade
products
(A2) grade
products
Ring-OSC clock
(oscillation frequency)
Subsystem clock
(oscillation frequency)
General-purpose registers
Minimum instruction execution time
Instruction set
I/O ports
Timers
Timer outputs
Clock output
Buzzer output
Note The internal flash memory capacity and internal expansion RAM capacity can be changed using the internal
memory size switching register (IMS) and the internal expansion RAM size switching register (IXS).
CHAPTER 1 OUTLINE
µ µ
PD780143 PD780144
24 KB 32 KB
1 KB
−
32 bytes
64 KB
Ceramic/crystal/external clock oscillation
REGC pin is connected directly to V
µ
1 F capacitor is connected to REGC pin:
REGC pin is connected directly to V
REGC pin is connected directly to V
On-chip Ring oscillation (240 kHz (TYP.))
Crystal/external clock oscillation (32.768 kHz)
*
8 bits × 32 registers (8 bits × 8 registers × 4 banks)
µ µ µ µ
0.2 s/0.4 s/0.8 s/1.6 s/3.2
µ µ µ µ
8.3 s/16.6 s/33.2 s/66.4 s/132.8
(TYP.) operation)
µ
122 s (subsystem clock: @ f
XT
• Multiply/divide (8 bits × 8 bits, 16 bits ÷ 8 bits)
• 16-bit operation
• Bit manipulate (set, reset, test, and Boolean operation)
Total:
CMOS I/O
CMOS input
CMOS output
N-ch open-drain I/O
• 16-bit timer/event counter: 2 channels (1 channel only in the
• 8-bit timer/event counter: 2 channels
• 8-bit timer: 2 channels
• Watch timer 1 channel
• Watchdog timer: 1 channel
5 (PWM output: 3)
• 78.125 kHz, 156.25 kHz, 312.5 kHz, 625 kHz, 1.25 MHz, 2.5 MHz, 5 MHz, 10 MHz
(X1 input clock: 10 MHz)
• 32.768 kHz (subsystem clock: 32.768 kHz)
1.22 kHz, 2.44 kHz, 4.88 kHz, 9.77 kHz (X1 input clock: 10 MHz)
User's Manual U15947EJ2V0UD
µ µ
PD780146 PD780148
48 KB 60 KB
1 KB
: 10 MHz (V = 4.0 to 5.5 V), 8.38 MHz (V
DD DD
3.3 to 5.5 V), 5 MHz (V
8.38 MHz (V = 4.0 to 5.5 V)
DD
: 10 MHz (V = 4.5 to 5.5 V), 8.38 MHz (V
DD DD
4.0 to 5.5 V), 5 MHz (V
: 8.38 MHz (V = 4.0 to 5.5 V), 5 MHz (V
DD DD
to 5.5 V)
µ
s (X1 input clock: @ f = 10 MHz operation)
XP
µ
s (TYP.) (Ring-OSC clock: @ f
= 32.768 kHz operation)
• BCD adjust, etc.
67
54
8
1
4
6 (PWM output: 3)
(1/2)
µ
PD78F0148
Note
60 KB
(flash
memory)
Note
1 KB
=
DD
= 2.7 to 5.5 V)
DD
=
DD
= 3.3 to 5.5 V)
DD
= 3.3
DD
= 240 kHz
R
µ
PD780143, 780144)
45