78K0 CAN family
Product Letter
The PD78(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 PD78(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.
Description
Block Diagram
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
s
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
PD78(F)0948/49
8-bit Microcontrollers
Watch Timer
Watchdog Timer
3-wire CSI
SI
SCK
40 x 4 LCD
Controller/Driver
AN0-AN7
UART
BRG
RxD
TxD
A/D Converter &
Power Fail Detection
Two 8-bit Timers
TI/TO
CPU
78K0
8-bit
RESET
ASTB
A8-15
AD0-7
WR
RD
Two 16-bit Timers
TI/TO
TI
ROM
60 Kbytes
Mask or
Flash
60 Kbytes
79 I/O Ports
Ports
System Control
Standby Control
Interrupt
Control
Clock Output
Control
X2
X1
PCL
INTP0-4
SGOA
SGO
Sound Generator
External
Bus Access
RC Subclock
CL2
CL1
SO
AV
SS
AV
REF
S0-S39
COM0-COM3
VLC0-VLC3
RAM
2 Kbytes
EEPROM
256 bytes
(optional)
DCAN Interface
CRxD
CTxD
CCLK
2-wire CSI
SIO
SCK
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.
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.
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 s at 8 MHz. The A/D
resistor chain can be switched off to reduce power consumption.
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.
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.
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.
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.
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 can be used to expand memory capacity or to connect external circuits using a
parallel interface.
Functional Block Description
CPU
DCAN Module
Serial Interface
Timer
LCD Driver
RC Subclock
A/D Converter
Sound Generator
External Access
Order Number
Description
Type
78K0-Toolset*
Tool Kit
Software/Hardware
IE-780948-SL-EM1
I/O Emulation Board
Hardware
IE-780948-SL-EM4
Probe Board
Hardware
EP-100GF-SL
Emulation Probe
Hardware
Flashmaster
Flash Programmer
Hardware
FA-100GF
Programming Adapter
Hardware
DSWIN-I3HD-780xx
Software Simulator
Software
CAN Family Roadmap
Devices
Tools
Part Number
ROM
RAM
Flash ROM
EEPROM
PD78F0948GF-3BA
-
2 Kbytes
60 Kbytes
-
PD78F0949GF-3BA
-
2 Kbytes
60 Kbytes
256 bytes
PD780948(A)GF-3BA
60 Kbytes
2 Kbytes
-
-
PD780949(A)GF-3BA
60 Kbytes
2 Kbytes
-
256 bytes
PD78(F)0948/49
8-bit Microcontrollers
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 Dsseldorf, 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.
Ordering Information
Part Number
Package
ROM
FLASH
RAM
EEPROM
Features
Miscellaneous
PD780812
64 QFP
16 Kbytes
-
0.8 Kbytes
256 bytes
RC subclock,
PD780814
64 QFP
32 Kbytes
-
1.3 Kbytes
256 bytes
clock monitor, SIO
PD78F0818
64 QFP
-
60 Kbytes 2.0 Kbytes
256 bytes
8.3 MHz/240 ns
PD780823
80 QFP
24 Kbytes
-
1.0 Kbytes
256 bytes
A/D converter +
SIO, universal instrument
PD780824
80 QFP
32 Kbytes
-
1.5 Kbytes
256 bytes
power-fail detector, motor driver, sound
PD78F0828
80 QFP
-
60 Kbytes 2.0 Kbytes
256 bytes
UART, 6 timer
generator, 4 x 28 LCD
PD780948(A)
100 QFP
60 Kbytes
-
2.0 Kbytes
-
channels, PWM,
RC subclock,
PD78F0948
100 QFP
-
60 Kbytes 2.0 Kbytes
-
DCAN (2 transmit
sound generator, 2 x SIO,
PD780949(A)
100 QFP
60 Kbytes
-
2.0 Kbytes
256 bytes
+ 16 receive)
4 x 40 LCD
PD78F0949
100 QFP
-
60 Kbytes 2.0 Kbytes
256 bytes
external memory expansion
For further information on NEC's 78K0 family or other NEC products visit our European website at
www.nec.de
*
Tool Kit includes Assembler, C Compiler, Debugger, In-circuit Emulator and PC Interface Board.
Documentation
Doc Number
Devices
Description
Type
U12326EJ3V0UM00
PD78094x(A), PD78F094x
78K0 Series Instruction
User's Manual
U12670EE1V0UM00
PD78094x(A), PD78F094x
Device User Manual
Preliminary User's Manual
U12237EE1V0PM00
PD780949(A), PD78F0949
Functional Description & Preliminary Product
U12375EE1V0PM00
PD780948(A), PD78F0948
Target Specification
Information
NEC Electronics (Europe) GmbH, Oberrather Str. 4, D-40472 Dsseldorf,
Tel. (02 11) 65 03 01, Fax (02 11) 65 03-3 27
NEC Electronics (Germany) GmbH, Kanzlerstr. 2, D-40472 Dsseldorf,
Tel. (02 11) 65 03 02, Fax (02 11) 65 03-4 90
- Knigstr. 12, D-30175 Hannover, Tel. (05 11) 3 34 02-0, Fax (05 11) 3 34 02-34
- Arabellastr. 17, D-81925 Mnchen, 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) - Tby Centrum, Entrance S (7th floor),
S-18322 Tby, 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 Cdex, Tl. (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
NEC Offices
With compliments
PD78(F)0948/49
8-bit Microcontrollers
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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