DS07-12536-5E
FUJITSU SEMICONDUCTOR
DATA SHEET
8-bit Proprietary Microcontroller
CMOS
F
2
MC-8L MB89940 Series
MB89943/945/P945/PV940
s
DESCRIPTION
The MB89940 series is specially designed for automotive instrumentation applications. It features a combination
of two PWM pulse generators and four high-drive-current outputs for controlling a stepping motor. It also contains
two analog inputs, two PWM pulse generators and 10-digit LCD controller/driver for various sensor/indicator
devices. The MB89940 series is manufactured with high performance CMOS technologies and packaged in a
48-pin QFP.
s
FEATURES
8-bit core CPU: 4 MHz system clock (8 MHz external, 500 ns instruction cycle)
21-bit timebase timer
Watchdog timer
Clock generator/controller
16-bit interval timer
Two PWM pulse generators with four high-drive-current outputs
Two-channel 8-bit A/D converter
Three external interrupt
Low supply voltage reset
External voltage monitor interrupt
Two more PWM pulse generators for controlling indicator devices
4-common 17-segment LCD driver/controller
Package: 48-pin plastic QFP, 48-pin ceramic MQFP
5.0 V single power supply (V
PP
required for MB89P945)
On-chip voltage regulator for internal 3.0 V power supply (MB89943, MB89945)
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PACKAGES
48-pin Plastic QFP
(FPT-48P-M16)
48-pin Ceramic MQFP
(MQP-48C-P01)
MB89940 Series
2
s
PRODUCT LINEUP
*1: Execution times and clock cycle times are dependent on the use of MCU.
*2: Varies with conditions such as the operating frequency. (See section "
s
Electrical Characteristics.") In the case
of the MB89PV940, the voltage varies with the restrictions of the EPROM for use.
Part number
MB89943
MB89945
MB89P945
MB89PV940
Item
Classification
Mass-produced products
(mask ROM products)
One-time PROM
Piggyback
ROM size
8 K
8 bits
(internal mask ROM)
16 K
8 bits
(internal mask ROM)
16 K
8 bits
(internal ROM)
32 K
8 bits
(external on piggyback)
RAM size
512
8 bits
1 K
8 bits
CPU functions
The number of instructions: 136
Instruction cycle:
0.5
s*
1
@8 MHz
Interrupt response time:
4.0
s*
1
@8 MHz
Multiply instruction time:
19 instruction cycles
Divide instruction time:
21 instruction cycles
Direct addressing memory-to/from-register data transfer:
7 instruction cycles
Ports
Output:
5-bit N-ch open-drain
Input/Output:
Two 8-bit CMOS schmitt I/Os and 8-bit CMOS I/Os
Timebase timer
21 bits
Interrupt interval: 1 ms, 4.1 ms, 32.8 ms or 524.3 ms
8-bit/16-bit timer
Can be used as two 8-bit timers or one 16-bit timer
Operation clock: 1
s, 16
s, 256
s or external *
1
Watchdog Reset
Reset interval: Approx. 524 ms to 1049 ms
Stepping motor
controller
Two 8-bit PWM pulse generators
Synchronized 4-channel high current output
Operation clock: 250 ns, 500 ns, 1
s or 4
s*
1
8-bit PWM timers
Two 8-bit PWM timers
External interrupt
3 channels, selective positive edge or negative edge trigger
A/D converter
8-bit resolution, two-channel input
A/D conversion time : (MB89943/945 : 26
s*
1
/8 MHz oscillation,
MB89P945/MB89PV940 : 22
s*
1
/8MHz oscillation)
LCD controller
4-common and 17-segment outputs
Number of outputs programmable
Low supply voltage
reset
Autonomous reset when low supply voltage
Reset voltage: 3.3 V, 3.6 V, 4.0 V
External voltage
monitor interrupt
Interrupts when voltage at external pin is lower than the reference voltage
Standby modes
Stop mode and sleep mode
Operating
voltage*
2
3.5 V to 5.5 V
Process
CMOS
External EPROM
MBM27C256A-20TVM
MB89940 Series
3
s
PACKAGE AND CORRESPONDING PRODUCTS
: Available
: Not available
Note: For more information about each package, see section "
s
Package Dimensions."
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DIFFERENCES AMONG PRODUCTS
1.
Memory Size
Prior to evaluating/developing the software for the MB89940 series, please check the differences between the
product types.
RAM/ROM configurations are dependent on the product type.
If the bottom address of the stack is set to the upper limit of the RAM address, it should be relocated when
changing the product type.
2.
Power Dissipation
For the piggyback product, add the power dissipation of the EEPROM on the piggyback.
The power dissipation differs between the product types.
3.
Technology
The mask ROM product is fabricated with a 0.5
m CMOS technology whereas the other products with 0.8
m
CMOS technology.
Also the mask ROM product contains the on-chip voltage regulator for the internal 3.0 power supply. For details,
refer to
MB89940 Series Hardware Manual
.
4.
Mask Option
Functions that can be selected as options and how to designate these options vary by the product.
Before using options check section "
s
Mask Options."
No options are available for the piggyback product.
The power-on reset and reset output options are always activated with the mask ROM product.
Pull-up option must not be specified with the pins used as LCD outputs.
Package
MB89943
MB89945
MB89P945
MB89PV940
FPT-48P-M16
MQP-48C-P01