msm82c55a-2gs Oki Semiconductor, msm82c55a-2gs Datasheet
msm82c55a-2gs
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msm82c55a-2gs Summary of contents
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... Compatible with 8255A-5 • 40-pin Plastic DIP (DIP40-P-600-2.54): (Product name: MSM82C55A-2RS) • 44-pin Plastic QFJ (QFJ44-P-S650-1.27): (Product name: MSM82C55A-2VJS) • 44-pin Plastic QFP (QFP44-P-910-0.80-2K): (Product name: MSM82C55A-2GS-2K) This version: Jan. 1998 MSM82C55A-2RS/GS/VJS Previous version: Aug. 1996 ...
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... Semiconductor CIRCUIT CONFIGURATION V CC GND 8 Data Bus Buffer RD Read/ WR Write Control RESET Logic MSM82C55A-2RS/GS/VJS 8 8 Group A Port A (8) 8 Group A Control 4 Group A Port C (High Order 4 Bits Group B Port C (Low Order 4 Bits) 8 Group B Control 8 Group B Port B ...
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... PIN CONFIGURATION (TOP VIEW) 44 pin Plastic QFP CS 1 GND MSM82C55A-2RS/GS/VJS 40 pin Plastic DIP GND ...
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... Supply Current V ≥ CCS IH (Standby I/O Wire Cycle Average Supply 82C55A-2 I Current (Active) CC ...8 MHzCPU Timing Rating MSM82C55A-2RS MSM82C55A-2GS MSM82C55A-2vJS –0 –0 –0 — –55 to +150 1.0 0 25°C Symbol Range – Symbol Min. ...
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... AOB — t SIB — t RIB t — RIT t — SIT t — AIT t — WIT = 0.8 V and V = 2.2 V for both inputs and outputs. H MSM82C55A-2RS/GS/VJS = 4 5 –40 to +85°C) Remarks Unit Max. — — ns — ns 120 — — ns — ns — ...
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... Basic Output Operation (Mode CS Port Output Strobe Input Operation (Mode 1) STB IBF INTR RD Port Input SIB t SIT t RIT t PH MSM82C55A-2RS/GS/VJS RIB 6/26 ...
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... Semiconductor Strobe Output Operation (Mode 1) WR OBF INTR ACK Port Output Bidirectional Bus Operation (Mode 2) WR OBF INTR ACK STB IBF Port AOB t WOB t WIT AOB t WOB SIB MSM82C55A-2RS/GS/VJS t AIT RIB 7/26 ...
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... Output "L" Voltage (V ) vs. Output Current ( Note: The direction of flowing into the device is taken as positive for the output current. MSM82C55A-2RS/GS/VJS ) – 85° 5 –1 –2 –3 –4 –5 Output Current I (mA) OH ...
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... When high level, the data bus is made into the high impedance status where no write nor read operation is performed. Internal registers hold their previous status, however. When low level, data is transferred from MSM82C55A-2 to CPU. When low level, data or control words are transferred from CPU to MSM82C55A-2 ...
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... Port C: One 8-bit data output latch/buffer and one 8-bit data input buffer (no latch for input) Single bit set/reset function for port C When port C is defined as an output port possible to set (to turn to high level) or reset (to turn to low level) any one of 8 bits individually without affecting other bits. MSM82C55A-2RS/GS/VJS ~ ...
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... Definition of input/ output of 8 bits of port B. Mode definition of group B. Definition of input/ output of high order 4 bits of port C. Definition of input/ output of 8 bits of port A. Mode definition of group A. D MSM82C55A-2RS/GS/VJS Operation 0 = Output 1 = Input 0 = Output 1 = Input 0 = Mode Mode Output 1 = Input 0 = Output 1 = Input D ...
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... Interrupt Control Function When the MSM82C55A-2 is used in mode 1 or mode 2, the interrupt signal for the CPU is provided. The interrupt request signal is output from port C. When the internal flip-flop INTE is set beforehand at this time, the desired interrupt request signal is output. When it is reset beforehand, however, the interrupt request signal is not output ...
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... Output 0 Input Output 1 Input Output 0 Input Input 1 Input Input 0 Input Input 1 Input Input is set, while INTE 4 MSM82C55A-2RS/GS/VJS Group B Low Order 4 Bits Port B of Port C Output Output Output Input Input Output Input Input Output Output Output Input Input Ouput Input Input ...
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... This is the signal used to interrupt the CPU when a terminal receives data from the CPU via the MSM82C55A-5. It indicates the occurrence of the interrupt in high level only when the internal INTE flip-flop is set. This signal turns to high level at the rising edge of the ACK ...
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... PC INTR Group A: Mode 1 Output I Group B: Mode 1 Input STB IBF INTR 0 B MSM82C55A-2RS/GS/VJS Group A: Output Group B: Output INTR B B OBF IBF B B STB ACK B B INTR A A I/O I/O I/O I/O ACK ACK A A OBF OBF ...
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... Selection of I when not defined as a control pin Input 0 = Output STB IBF INTR Group A: Mode 1 Input I Group B: Mode 1 Output OBF ACK INTR 0 B MSM82C55A-2RS/GS/VJS and 16/26 ...
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... Following is an example of the relation between the control word and the pin when used in mode 2. When input in mode 2 for group A and in mode 1 for group B. MSM82C55A-2RS/GS/VJS PC INTR OBF INTE ACK 1 ...
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... Semiconductor ¥ MSM82C55A-2RS/GS/VJS ¥ ¥ ¥ As all of 8 bits of port C become control pins in this case, D and 3 D bits are treated as "Don't Care" I/O specification is required for mode 2, since bidirectional operation. ...
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... I/O A STB ACK INTR IBF the Control Word bits can be accessed by the bit set/reset function only can be accessed by normal write operation. 0 -PC bits. Note that the status of port MSM82C55A-2RS/GS/VJS I/O I/O I/O A I/O I/O I/O A STB IBF INTR ...
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... Be sure to keep the RESET signal at power ON in the high level at least for 50 ms. Subsequently, it becomes the input mode at a high level pulse above 500 ns. Note: Comparison of MSM82C55A-5 and MSM82C55A-2 MSM82C55A-5 After a write command is executed to the command register, the internal latch is cleared in PORTA PORTC ...
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... When you want to replace your low speed devices with high-speed devices, read the replacement notice given on the next pages. High-speed device (New) M80C85AH M80C86A-10 M80C88A-10 M82C84A-2 M81C55-5 M82C37B-5 M82C51A-2 M82C53-2 M82C55A-2 MSM82C55A-2RS/GS/VJS Remarks Low-speed device (Old) M80C85A/M80C85A-2 8bit MPU 16bit MPU M80C86A/M80C86A-2 8bit MPU M80C88A/M80C88A-2 Clock generator M82C84A/M82C84A-5 RAM.I/O, timer ...
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... Electrical Characteristics 3-1) DC Characteristics Parameter ''L'' Output Voltage ''H'' Output Voltage Average Operating Current As shown above, the DC characteristics of the MSM82C55A-2 satisfies the DC characteristics of the MSM82C55A-5. 3-2) AC Characteristics Parameter Address Hold Time for RD Rising RD Pulse Width Difined Data Output Delay Time From RD Falling ...
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... RD Rising to IBF Falling Delay Time RD Falling to INTR Falling Delay Time STB Rising to INTR Rising Delay Time ACK Rising to INTR Rising Delay Time WR Falling to INTR Falling Delay Time As shown above, the MSM82C55A-2 satisfies the characteristics of the MSM82C55A-5. MSM82C55A-2RS/GS/VJS Symbol MSM82C55A minimum ...
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... Therefore, before you perform reflow mounting, contact Oki’s responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). MSM82C55A-2RS/GS/VJS (Unit : mm) Package material Epoxy resin ...
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... Therefore, before you perform reflow mounting, contact Oki’s responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). MSM82C55A-2RS/GS/VJS (Unit : mm) Package material Epoxy resin ...
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... Therefore, before you perform reflow mounting, contact Oki’s responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). MSM82C55A-2RS/GS/VJS (Unit : mm) Package material Epoxy resin ...