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PDF UPD784908GF Data sheet ( Hoja de datos )
| Número de pieza | UPD784908GF | |
| Descripción | 16-BIT SINGLE-CHIP MICROCONTROLLER | |
| Fabricantes | NEC | |
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DATA SHEET
MOS INTEGRATED CIRCUIT
µPD784907, 784908
16-BIT SINGLE-CHIP MICROCONTROLLER
The µPD784907 and µPD784908 are products of the µPD784908 Subseries in the 78K/IV Series. These products
contain various peripheral hardware such as IEBusTM controller, ROM, RAM, I/O ports, 8-bit resolution A/D, timers,
serial interface, and interrupt functions, as well as a high-speed, high-performance CPU.
In addition, the µPD78P4908 (one-time PROM product), which is used to evaluate the functions of mask ROM
versions, and development tools are also available.
Detailed function descriptions are provided in the following user's manuals. Be sure to read them before
designing.
µPD784908 Subseries User's Manual Hardware : U11787E
78K/IV Series User's Manual Instruction
: U10905E
FEATURES
• 78K/IV Series
• Minimum instruction execution time: 320 ns (at 6.29 MHz)
160 ns (at 12.58 MHz)
• Number of I/O ports: 80
• Timer/counters: 16-bit timer/counter × 3 units
16-bit timer × 1 unit
• Serial interface: 4 channels
UART/IOE (3-wire serial I/O): 2 channels
CSI (3-wire serial I/O):
2 channels
• PWM outputs: 2
• Standby function
HALT/STOP/IDLE mode
• Clock frequency division function
• Watchdog timer: 1 channel
• Clock output function
Selectable from fCLK, fCLK/2, fCLK/4, fCLK/8, or fCLK/16
• A/D converter: 8-bit resolution × 8 channels
• On-chip IEBus controller
• Watch timer
• Low-power consumption
• Supply voltage: VDD = 4.0 to 5.5 V
(Main clock: fXX = 12.58 MHz,
internal system clock = fXX,
fCYK = 79 ns)
VDD = 3.5 to 5.5 V
(Other than above, fCYK = 159 ns)
APPLICATIONS
Car audios, etc.
This document describes the µPD784908 unless otherwise specified.
The information in this document is subject to change without notice.
Document No. U11680EJ2V0DS00 (2nd edition)
Date Published February 1999 N CP(K)
Printed in Japan
The mark shows major revised points.
©
1996
1 page  
µPD784907, 784908
Item
Part Number
µPD784907
µPD784908
Watchdog timer
1 channel
Standby
HALT/STOP/IDLE modes
Interrupt
Hardware source 27 (20 internal, 7 external (sampling clock variable input: 1))
Software source BRK or BRKCS instruction, operand error
Non-maskable 1 internal, 1 external
Maskable
19 internal, 6 external
4-level programmable priority
3 operation statuses: vectored interrupt, macro service, context switching
Power supply voltage
VDD = 4.0 to 5.5 V (Main clock: fXX = 12.58 MHz, internal system clock = fXX, fCYK = 79 ns)
VDD = 3.5 to 5.5 V (other than above, fCYK = 159 ns)
Package
100-pin plastic QFP (14 × 20 mm)
Data Sheet U11680EJ2V0DS00
5
5 Page 
A8 to A19:
Address bus
AD0 to AD7: Address/data bus
ANI0 to ANI7: Analog input
ASCK, ASCK2: Asynchronous serial clock
ASTB:
Address strobe
AVDD:
Analog power supply
AVREF1:
Reference voltage
AVSS:
Analog ground
CI: Clock input
CLKOUT:
Clock output
HLDAK:
Hold acknowledge
HLDRQ:
Hold request
INTP0 to INTP5: Interrupt from peripherals
NMI:
Non-maskable interrupt
P00 to P07:
Port 0
P10 to P17:
Port 1
P20 to P27:
Port 2
P30 to P37:
Port 3
P40 to P47:
Port 4
P50 to P57:
Port 5
P60 to P67:
Port 6
P70 to P77:
Port 7
P90 to P97:
Port 9
P100 to P107: Port 10
µPD784907, 784908
PWM0, PWM1: Pulse width modulation output
RD: Read strobe
REFRQ:
Refresh request
REGC:
Regulator capacitance
REGOFF:
Regulator off
RESET:
Reset
RX: IEBus receive data
RXD, RXD2:
Receive data
SCK0 to SCK3: Serial clock
SI0 to SI3:
Serial input
SO0 to SO3: Serial output
TEST:
Test
TO0 to TO3: Timer output
TX: IEBus transmit data
TXD, TXD2:
Transmit data
VDD:
Power supply
VSS:
Ground
WAIT:
Wait
WR: Write strobe
X1, X2:
Crystal (main system clock)
XT1, XT2:
Crystal (watch)
Data Sheet U11680EJ2V0DS00
11
11 Page | ||
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