78K0 CAN family
Product Letter
Description
µPD78(F)0948/49
8-bit Microcontrollers
The µPD78(F)094x with an on-chip CAN interface is a member of a new branch of NEC’s 78K0
8-bit microcomputer family. Based on 0.35 mm technology, the devices integrate powerful
application-specific peripherals in combination with EEPROM and Flash memory technology.
They offer outstanding perspectives and opportunities for system solutions at an excellent price/
performance ratio. There are now over 120 different devices in NEC’s established and powerful
78K0 8-bit microcomputer family. All new products will be offered as mask ROM and Flash EPROM.
The µPD78(F)094x is suited for dashboard, air conditioning and high-end body controller
applications in the automotive sector. In addition, the device is ideal for applications where CAN
functionality is combined with control-oriented peripherals. In particular, there is full support for
systems connected to an LCD display. Since the LCD output is shared with a general-purpose pin,
non-LCD applications are also covered.
• 60 Kbytes internal mask ROM or Flash EPROM
• 2 Kbytes internal RAM (high speed: 1024 bytes;
LCD display: 40 bytes; expansion: 992 bytes)
• 256 bytes EEPROM optional
• Instructions execution time adjustable from
0.25
µs
at 8 MHz down to RC subsystem clock
• Powerful instruction set
• Bit manipulation in entire address space
• Built-in multiply and divide instructions
• DCAN Interface (2 transmit buffers; up to 16
program receive buffers)
• 4 x 40 segments LCD controller/driver
• 8-channel 8-bit A/D converter, including power
failure detector
• Serial interface (3-wire, 2-wire, UART)
• Timer channels (2 x 16-bit timer, 2 x 8-bit timer/
event counter, watch timer, watch dog timer)
• Sound generator
• External access
• Vectored interrupts (22 internal, 5 external)
• 79 I/O ports
• RC subsystem clock oscillator
• Built-in clock oscillator circuit
• Standby control (HALT, STOP mode)
• Operating supply voltage: 4.0 – 5.5 V
• 100-pin QFP package (14 mm x 20 mm)
Applications
Features
Block Diagram
TI/TO
TI
Two 16-bit Timers
ROM
60 Kbytes
Mask or
Flash
60 Kbytes
CPU
78K0
8-bit
External
Bus Access
DCAN Interface
CRxD
CTxD
CCLK
SGOA
SGO
ASTB
A8-15
EEPROM
256 bytes
(optional)
AD0-7
WR
RD
CL2
CL1
TI/TO
Two 8-bit Timers
RAM
2 Kbytes
Sound Generator
Watch Timer
Watchdog Timer
SI
SO
SCK
SIO
SCK
RxD
TxD
S0-S39
COM0-COM3
VLC0-VLC3
AN0-AN7
AV
SS
AV
REF
40 x 4 LCD
Controller/Driver
3-wire CSI
2-wire CSI
RC Subclock
UART
BRG
Ports
System Control
Standby Control
RESET
X2
X1
PCL
INTP0-4
79 I/O Ports
Interrupt
Control
Clock Output
Control
A/D Converter &
Power Fail Detection
Functional Block Description
CPU
The heart of the 78K0 family is a powerful 8-bit CPU. The 0.35 mm process technology ensures
an excellent power/performance ratio. Four 8-bit register banks can be concatenated to a 16-bit
register to support 16-bit operation, eg, 8-bit multiplication with a 16-bit result or 16-bit index
addressing. The 64-Kbyte linear address space is accessed via 16-bit addresses. Bit
manipulation operations are supported on all registers and the entire RAM address space.
Subclock CPU operation to reduce system power consumption is also supported.
DCAN Module
With its minimized circuit design, NEC’s DCAN module is an ideal solution for providing full
hardware support for most stand-alone CAN communication applications. Transmission is
supported by two independent transmit buffers with easy priority control. With up to 16
mailboxes in the communication RAM, the receive path provides virtually “Full CAN”
performance. The expansion RAM is used as CAN data RAM to the CPU. The number of
mailboxes for transmission and CAN can be configured by setting the DCAN’s SFR registers.
Each message buffer allocates 16 bytes of expansion RAM, resulting in a RAM requirement of
maximum 288 bytes for the DCAN module.
A/D Converter
The converter has 8 channels with 8-bit resolution. One of the channels can be used as a failure
detector that generates an internal interrupt on recognizing an analog input above/below a
certain voltage. The 8-bit conversion time per channel is typically below 18 µs at 8 MHz. The A/D
resistor chain can be switched off to reduce power consumption.
Serial Interface
The serial interface includes one UART (Universal Asynchronous Receiver Transmitter) that
supports transfer rates up to 125 kbps. A dedicated baud rate generator sets the transfer rate. A
3-wire CSI (Clocked Serial Interface) for transfer rates up to 1.25 Mbps is also provided. An I
2
C
bus system can be configured using the 2-wire CSI.
Timer
A flexible timer offers a total of 6 timer channels. Two-channel 16-bit timers can be used to
generate a basic time interval, for PWM with compare registers and for precise measurements
with up to three 16-bit capture registers. Two-channel 8-bit timers can be used as interval timers,
for PWM output and as external event counters. The watch timer generates a watch time and
can be used simultaneously as an interval timer. The on-chip watchdog timer monitors the CPU
and generates either an internal reset or a non-maskable interrupt. It can also be used as an
additional interval timer if the watchdog function is not required.
RC Subclock
The subclock is driven by an external RC connected to the CL1/CL2 terminal pair. This is a very
inexpensive method of generating a low frequency for much lower power consumption in
subclock mode.
LCD Driver
The LCD controller/driver can drive up to 160 LCD segments (40 segments, 4 commons).All
LCD segments are shared with ports and can be selected bitwise to ensure maximum port pin
availability if the application does not require all LCD segments.
Sound Generator
The sound generator produces sounds composed of a frequency output and a PWM signal for
volume control. The generated frequency is in the range of 256 Hz to 7.7 kHz. It can be used for
simple alarm sounds, like buzzer, gong and beeper.
External Access
External access can be used to expand memory capacity or to connect external circuits using a
parallel interface.
µPD78(F)0948/49
8-bit Microcontrollers
CAN Family Roadmap
At its European Technology Center (ETC), NEC has started work on a series of ASSPs (Application Specific Standard Products)
targeted at the CAN market. The CAN product roadmap, based on the 78K0 8-bit CPU core, is shown in the table below.
Located at NEC’s European headquarters in Düsseldorf, the ETC enables NEC to respond faster and more flexibly to the
demands of European customers. Further CAN products, based on different microcontroller cores like the 78K0 8-bit or V850
32-bit RISC family, are under development.
Part Number
µPD780812
µPD780814
µPD78F0818
µPD780823
µPD780824
µPD78F0828
µPD780948(A)
µPD78F0948
µPD780949(A)
µPD78F0949
Package
64 QFP
64 QFP
64 QFP
80 QFP
80 QFP
80 QFP
100 QFP
100 QFP
100 QFP
100 QFP
ROM
16 Kbytes
32 Kbytes
-
24 Kbytes
32 Kbytes
-
60 Kbytes
-
60 Kbytes
-
FLASH
-
-
-
-
-
-
RAM
0.8 Kbytes
1.3 Kbytes
1.0 Kbytes
1.5 Kbytes
2.0 Kbytes
2.0 Kbytes
EEPROM
256 bytes
256 bytes
256 bytes
256 bytes
256 bytes
256 bytes
-
-
256 bytes
256 bytes
Features
Miscellaneous
RC subclock,
clock monitor, SIO
SIO, universal instrument
generator, 4 x 28 LCD
RC subclock,
sound generator, 2 x SIO,
4 x 40 LCD
external memory expansion
60 Kbytes 2.0 Kbytes
8.3 MHz/240 ns
A/D converter +
UART, 6 timer
channels, PWM,
DCAN (2 transmit
+ 16 receive)
power-fail detector, motor driver, sound
60 Kbytes 2.0 Kbytes
60 Kbytes 2.0 Kbytes
60 Kbytes 2.0 Kbytes
Ordering Information
Devices
Part Number
µPD78F0948GF-3BA
µPD78F0949GF-3BA
µPD780948(A)GF-3BA
µPD780949(A)GF-3BA
ROM
-
-
60 Kbytes
60 Kbytes
RAM
2 Kbytes
2 Kbytes
2 Kbytes
2 Kbytes
Flash ROM
60 Kbytes
60 Kbytes
-
-
EEPROM
-
256 bytes
-
256 bytes
Documentation
Doc Number
U12326EJ3V0UM00
U12670EE1V0UM00
U12237EE1V0PM00
U12375EE1V0PM00
Devices
µPD78094x(A), µPD78F094x
µPD78094x(A), µPD78F094x
µPD780949(A), µPD78F0949
µPD780948(A), µPD78F0948
Description
78K0 Series Instruction
Device User Manual
Type
User’s Manual
Preliminary User’s Manual
Functional Description & Preliminary Product
Target Specification
Information
Tools
Order Number
78K0-Toolset*
IE-780948-SL-EM1
IE-780948-SL-EM4
EP-100GF-SL
Flashmaster
FA-100GF
DSWIN-I3HD-780xx
*
Description
Tool Kit
I/O Emulation Board
Probe Board
Emulation Probe
Flash Programmer
Programming Adapter
Software Simulator
Type
Software/Hardware
Hardware
Hardware
Hardware
Hardware
Hardware
Software
Tool Kit includes Assembler, C Compiler, Debugger, In-circuit Emulator and PC Interface Board.
For further information on NEC’s 78K0 family or other NEC products visit our European website at
www.nec.de
µPD78(F)0948/49
8-bit Microcontrollers
NEC Offices
NEC Electronics (Europe) GmbH,
Oberrather Str. 4, D-40472 Düsseldorf,
Tel. (02 11) 65 03 01, Fax (02 11) 65 03-3 27
NEC Electronics (Germany) GmbH,
Kanzlerstr. 2, D-40472 Düsseldorf,
Tel. (02 11) 65 03 02, Fax (02 11) 65 03-4 90
- Königstr. 12, D-30175 Hannover, Tel. (05 11) 3 34 02-0, Fax (05 11) 3 34 02-34
- Arabellastr. 17, D-81925 München, Tel. (0 89) 92 10 03-0, Fax (0 89) 91 31 82
- Industriestr. 3, D-70565 Stuttgart, Tel. (07 11) 9 90 10-0, Fax (07 11) 9 90 10-19
NEC Electronics (BNL)
- Boschdijk 187a, NL-5612 HB Eindhoven,
Tel. (0 40) 2 44 58 45, Fax (0 40) 2 44 45 80
NEC Electronics (Scandinavia)
- Täby Centrum, Entrance S (7th floor),
S-18322 Täby, Tel. (08) 6 38 08 20, Fax (08) 6 38 03 88
NEC Electronics (France) S.A.,
9, rue Paul Dautier, B.P. 187,
F-78142 Velizy-Villacoublay Cédex, Tél. (01) 30 67 58 00, Fax (01) 30 67 58 99
NEC Electronics (France) S.A., Representacion en Espana,
Juan Esplandiu 15, E-28007 Madrid, Tel. (01) 5 04 27 87, Fax (01) 5 04 28 60
NEC Electronics Italiana S.R.L.,
Via Fabio Filzi, 25A, I-20124 Milano,
Tel. (02) 66 75 41, Fax (02) 66 75 42 99
- Rome Office, Via Monte Cervialto, 131, I-00139 Roma,
Tel. (06) 8 86 22 91/2, Fax (06) 8 86 22 39
NEC Electronics (UK) Ltd.,
Cygnus House, Sunrise Parkway, Milton Keynes,
GB-MK14 6NP, Tel. (0 19 08) 69 11 33, Fax (0 19 08) 67 02 90
- Scotland Office, Block 3, Carfin Industrial Estate, Motherwell GB-ML1 4UL,
Tel. (0 16 98) 73 22 21, Fax (0 16 98) 83 38 68
© Published by NEC Electronics (Europe) GmbH, Printed in Germany, June 1998
Document No. U12097EE3V0PL00
With compliments
NEC makes no warranty with respect to this documentation and disclaims any implied warranties of merchantability or fitness for particular purpose.
NEC does not assume any responsibility for circuits shown or claim that they are free from patent infringement. Product specifications are subject to change
without notice. To ensure that you have the latest product data, please contact your local NEC sales office.
© NEC Electronics (Europe) GmbH
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