|Company||ST Microelectronics, Inc.|
|Datasheet||Download 68901N04 datasheet
8 INPUT/OUTPUT PINS Individually programmable direction Individual interrupt source capability - Programmable edge selection 16 SOURCE INTERRUPT CONTROLLER 8 Internal sources 8 External sources Individual source enable Individual source masking Programmable interrupt service modes - Polling - Vector generation - Optional In-service status Daisy chaining capability FOUR TIMERS WITH INDIVIDUALLY PROGRAMMABLE PRESCALING Two multimode timers - Delay mode - Pulse width measurement mode - Event counter mode Two delay mode timers Independent clock input Time out output option SINGLE CHANNEL USART Full Duplex Asynchronous to 65 kbps Byte synchronous to 1 Mbps Internal/External baud rate generation DMA handshake signals Modem control Loop back mode 68000 BUS COMPATIBLE 48 PIN DIP OR 52 PIN PLCC
DESCRIPTION The MK68901 MFP (Multi-Function Peripheral) is a combination of many of the necessary peripheral functions in a microprocessor system. Included are : Eight parallel I/O lines Interrrupt controller for 16 sources Four timers Single channel full duplex USART The use of the MFP in a system can significantly reduce chip count, thereby reducing system cost. The MFP is completely 68000 bus compatible, and 24 directly addressable internal registers provide the neDecember 1988
necessary control and status interface to the programmer. The MFP is a derivative of the MK3801 STI, a Z80 family peripheral. PIN DESCRIPTION GND : Ground VCC : +5 volts 5%) Chip Select (input, active, low). CS is used to select the MK68901 MFP for accesses to the internal registers. CS and IACK must not be asserted at the same time. DS : Data Strobe (input, active low). DS is used as part of the chip select and interrupt acknowledge functions. R/W : Read/Write (input). R/W is the signal from the bus master indicating whether the current bus cycle is a Read (High) or Write (Low) cycle. DTACK : Data Transfer Acknowledge. (output, active low, tri-stateable) DTACK is used to signal the bus master that data is ready, or that data has been accepted by the MK68901 MFP. A1-A5 : Address Bus (inputs). The adress bus is used to adress one of the internal registers during a read or write cycle. Data Bus (bi-directional, tri-stateable). The data bus is used to receive data from or transmit data to one of the internal registers during a read or write cycle. It is also used to pass a vector during an interrupt acknowledge cycle. Clock (input). This input is used to provide the internal timing for the MK68901 MFP. IACK :
knowledge cycle or by clearing the pending interrupt(s) through software. Interrupt Acknowledge (input, active low). IACK is used to signal the MK68901 MFP that the CPU is acknowledging an interrupt. CS and IACk must not be asserted at the same time. Interrupt Enable In (input, active low). IEI is used to signal the MK68901 MFP that no higher priority device is requesting interrupt service. Interrupt Enable Out (output, active low). IEO is used to signal lower priority peripherals that neither the MK68901 MFP nor another higher priority peripheral is requesting interrupt service. General Purpose Interrupt I/O lines. These lines may be used as interrupt inputs and/or I/O lines. When used as interrupt inputs, their active edge is programmable. A data direction register is used to define which lines are to be Hi-Z inputs and which lines are to be push-pull TTL compatible outputs. Serial Output. This is the output of the USART transmitter. Serial Input. This is the input to the USART receiver. Receiver Clock. This input controls the serial bit rate of the USART receiver. Transmitter Clock. This input controls the serial bit rate of the USART transmitter. Receiver Ready. (output, active low) DMA output for receiver, which reflects the status of Buffer Full in port number 15. Transmitter Ready. (output, active low) DMA output for transmitter, which reflects the status of Buffer Empty in port number 16.
RESET : Device reset. (input, active low). Reset disables the USART receiver and transmitter, stops all timers and forces the timer outputs low, disables all interrupt channels and clears any pending interrupts. The General Purpose Interrupt/I/O lines will be placed in the tri-state input mode. All internal registers (except the timer, USART data registers, and transmit status register) will be cleared. INTR : Interrupt Request (output, active low, open drain). INTR is asserted when the MK68901 MFP is requesting an interrupt. INTR is negated during an interrupt ac2/33
TAO,TBO, Timer Outputs. Each of the four timers TCO,TDO: has an output which can produce a square wave. The output will change states each timer cycle ; thus one full period of the timer out signal is equal to two timer cycles. TAO or TBO can be reset (logic "O") by a write to TACR, or TBCR respectively. XTAL2 : Timer Clock inputs. A crystal can be connected between XTAL1 and or XTAL1 can be driven with a TTL level clock. When driving XTAL1 with a TTL le-
vel clock, XTAL2 must be allowed to float. When using a crystal, external capacitors are required. See figure 33. All chip accesses are independent of the timer clock. TAI,TBI : Timer A, B inputs. Used when running the timers in the event count or the pulse width measurement mode. The interrupt channels associated with 14 and 13 are used for TAI and TBI, respectively. Thus, when running a timer in the pulse width
|Related products with the same datasheet|
|Some Part number from the same manufacture ST Microelectronics, Inc.|
|68901N05 Multi.function Peripheral|
|74AC00 Quad 2-INPUT NAND Gate|
|74AC02 Quad 2-INPUT NOR GATE|
|74AC04 Hex Inverter|
|74AC08 Quad 2-INPUT And Gate|
|74AC10 Triple 3-INPUT NAND Gate|
|74AC11 Triple 3-INPUT And Gate|
|74AC125 Quad Bus Buffers (3-STATE)|
|74AC138 3 to 8 Line Decoder (INVERTING)|
|74AC14 Hex Schmitt Inverter|
|74AC157 Quad 2 Channel Multiplexer|
|74AC158 Quad 2 Channel Multiplexer (INV.)|
|74AC161 Synchronous Presettable 4-BIT Counter|
|74AC16244 16-BIT Bus Buffer With 3 State Outputs (NON INVERTED)|
|74AC16245 16-BIT Bus Transceiver With 3-STATE Outputs|
|74AC163 Synchronous Presettable 4-BIT Counter|
|74AC16373 16-BIT D-type Latch With 3-STATE Outputs (NON INVERTED)|
|74AC16374 16-BIT D-type Flip-flop With 3-STATE Outputs (NON INVERTED)|
|74AC163B Synchronous Presettable 4-BIT Counter|
|74AC16541 16-BIT Bus Buffer With 3-STATE Outputs (NON INVERTED)|
|74AC174 Hex D-type Flip Flop With Clear|
AT93C46Automotive : 1K, 3-Wire Bus Serial Automotive EePROM. 5.0 (VCC 2.7 (VCC to 5.5V) User-selectable Internal Organization 16 3-wire Serial Interface 2 MHz Clock Rate (5V) Self-timed Write Cycle (10 ms max) High Reliability Endurance: 1 Million Write Cycles Data Retention: 100 Years 8-lead PDIP and 8-lead JEDEC SOIC Packages The AT93C46/56/66 provides 1024/2048/4096 bits of serial electrically erasable.
DCP020505P : ti DCP020505, Miniature, 2W ISOlated Unregulated DC/DC Converters. TO 89% EFFICIENCY THERMAL PROTECTION DEVICE-TO-DEVICE SYNCHRONIZATION SO-28 POWER DENSITY (6.5W/cm3) EN55022 CLASS B EMC PERFORMANCE UL1950 RECOGNIZED JEDEC 14-PIN AND SO-28 PACKAGES The DCP02 series is a family of 2W, unregulated, isolated DC/DC converters. Requiring a minimum of external components and including on-chip device protection, the DCP02.
TP3C335 : Solid Tantalum Surface Mount Capacitors Tantamount¢ē Molded Case, High Performance.
341100100 : Thumbwheel Switches. /Benefits Most complete product offering in the industry Spacers available to fit most panel cutouts Front or rear mounting options Typical Applications Test & measurement equipment Industrial equipment Computer devices s CONTACT RATING: CARRY: 1 AMP continuous. SWITCH: 100 mA max. OPERATING VOLTAGE: 120 V AC. ELECTRICAL LIFE: 100,000 actuations. CONTACT.
KBS-23DA-4A : Buzzer Elements, Piezo Bender Standard -; BUZZER PIEZO ELEMENT 4KHZ 23MM. s: Frequency: 4kHz ; Capacitance @ Frequency: 12000pF @ 1kHz ; Voltage - Input (Max): - ; Impedance: 600 Ohm ; Packaging: Bulk ; Size: 0.91" Dia (23mm) ; Type: Standard ; Lead Free Status: Lead Free ; RoHS Status: RoHS Compliant.
IAR3F1100 : Pushbutton Switches SWITCH PB LOW PROFILE IP67 BLUE. s: Manufacturer: Apem ; RoHS: Details ; Contact Form: SPST ; Switch Function: OFF - (ON) ; Current Rating (Max): 2 Amps ; Voltage Rating DC: 24 Volts ; Mounting Style: Panel ; Illumination: Not Illuminated ; IP Rating: IP67 ; Termination Style: Wire Leads ; Contact Plating: Silver ; Actuator:.
91A1A-B24-D15L : Potentiometers 5/8" 10K 20% Square Single Turn. s: Manufacturer: Bourns ; Product Category: Potentiometers ; RoHS: Details ; Product: Potentiometer ; Resistance: 10 KOhms ; Power Rating: 250 mWatts (1/4 Watt) ; Tolerance: 20 % ; Taper: Audio ; Element Type: Conductive Plastic ; Number of Turns: 1 ; Shaft Type: Slotted ; Shaft Length: 3/4 in ; Mounting.
B82432X0001 : KIT, INDUCTOR, B82432 SERIES. s: Kit Contents: SIMID 1812-T Inductors ; Range of Inductor Values: 24 Values of 1µH to 1mH.
ECW-H20182JV : 1800pF Film Capacitor Radial; CAP FILM 1800PF 2KVDC RADIAL. s: Capacitance: 1800pF ; Tolerance: ±5% ; Dielectric Material: Polypropylene, Metallized ; Package / Case: Radial ; Packaging: Bulk ; Lead Spacing: 0.591" (15.00mm) ; ESR (Equivalent Series Resistance): - ; Mounting Type: Through Hole ; : High Frequency and High Stability ; Lead Free Status:.
151210-2420-TB : Gold Surface Mount Rectangular - Headers, Male Pin Connectors, Interconnect Header, Unshrouded; CONN HEADER 2MM 10PS DL SMD 30AU. s: Color: Black ; Connector Type: Header, Unshrouded ; Contact Finish: Gold ; Contact Mating Length: 0.152" (3.86mm) ; : - ; Mounting Type: Surface Mount ; Number of Positions Loaded: All ; Number of Rows: 2 ; Pitch: 0.079".
SSW-104-01-S-S : Gold Through Hole Rectangular - Headers, Receptacles, Female Socket Connectors, Interconnect Receptacle; CONN RCPT .100" 4POS SNGL GOLD. s: Color: Black ; Connector Type: Receptacle ; Contact Finish: Gold ; : - ; Mounting Type: Through Hole ; Number of Positions Loaded: All ; Number of Rows: 1 ; Pitch: 0.100" (2.54mm) ; Row Spacing: - ; Packaging: Bulk.
70454-1306LF : Gold Through Hole Backplane - Specialized Connectors, Interconnect Header, Male Pins; METRAL SIGNAL HEADER-7 MOD 4ROW. s: Color: Natural ; Connector Style: - ; Connector Type: Header, Male Pins ; Connector Usage: - ; Contact Finish: Gold ; Contact Finish Thickness: 30µin (0.76µm) ; Contact Layout, Typical: - ; : - ; Mounting Type: Through Hole ; Number.
PNZ158 : Optical - Photo Detectors - Phototransistors NPN PHOTOTRANS 800NM SIDE VIEW -; NPN PHOTOTRANS 800NM SIDE VIEW. s: Voltage - Collector Emitter Breakdown (Max): 20V ; Current - Collector (Ic) (Max): 20mA ; Current - Dark (Id) (Max): 1µA ; Power - Max: 100mW ; Orientation: Side View ; Mounting Type: Through Hole ; Package / Case: Radial ; Wavelength: 800nm.
UNR9215G0L : Transistor (bjt) - Single, Pre-biased Discrete Semiconductor Product 100mA 50V 125mW NPN - Pre-Biased; TRANS NPN W/RES 160HFE SSMINI 3P. s: Transistor Type: NPN - Pre-Biased ; Voltage - Collector Emitter Breakdown (Max): 50V ; Current - Collector (Ic) (Max): 100mA ; Power - Max: 125mW ; Resistor - Base (R1) (Ohms): 10K ; Resistor - Emitter Base (R2).
C0201 : CAPACITOR, CERAMIC, MULTILAYER, 6.3; 16; 25 V, SURFACE MOUNT, 0201. s: Configuration / Form Factor: Chip Capacitor ; Technology: Multilayer ; Applications: General Purpose ; Electrostatic Capacitors: Ceramic Composition ; Mounting Style: Surface Mount Technology ; Operating Temperature: -55 to 85 C (-67 to 185 F).
SWM-1200-1 : 250 MHz - 18000 MHz RF/MICROWAVE SGL POLE DOUBLE THROW SWITCH, 2.75 dB INSERTION LOSS. s: Frequency Range: 250 to 18000 MHz ; Insertion Loss: 2.75 dB ; VSWR: 2 1 ; Type: Single Pole Double Throw ; Operating Temperature: -55 to 85 C (-67 to 185 F).
PSMP-MSLD-PCT1R : RF Connectors / Coaxial Connectors PCB Jack M-Cnt. SMT Limited Detent 1.0mm. Amphenol RF PSMP Board-to-Board Solutions are a connector series designed for board-to-board applications requiring high power. PSMP Board-to-Board Solutions provide a three-piece design and 12.6mm minimum board spacing. These design allow PSMP connectors to offer maximum flexibility.