upd4701a Renesas Electronics Corporation., upd4701a Datasheet
upd4701a
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upd4701a Summary of contents
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INCREMENTAL ENCODER COUNTER DESCRIPTION The PD4701A is a counter for 2-axis incremental encoder. When a two-phase encoder signal is input for the X and Y axes, direction discrimination and computation is performed, and count data is output ...
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ORDERING INFORMATION Part Number PD4701AC 24-pin plastic DIP (600 mil) PD4701AGT 24-pin plastic SOP (375 mil) BLOCK DIAGRAM Phase X A Determination and X Edge Detection B RESET X RESET Y Phase Y A Determination and Y Edge Detection B ...
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PIN FUNCTIONS Pin Name Input/Output CPU CS Input interface block X/Y Input U/L Input RESET X Input RESET Y D Output (3-state) CF Output SF Output Mouse Input A B interface (Schmitt input) block ...
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DESCRIPTION OF OPERATIONS 1. COUNT OPERATION The PD4701A executes an up-count and down-count by means of A & B 2-phase signals in the 12-bit up-down counter. An up-count is performed when the A-phase signals (X performed when the B-phase signals ...
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SWITCH INPUT OPERATION The PD4701A can process contact points as switch inputs (active-“L” input). Switch input is read as part of the count data upper byte together with the switch flag status as an internal status ...
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CONNECTION TO CPU SYSTEM An example of connection to a CPU system is shown in Fig. 4. Fig. 4 Example of Connection to CPU System Output Port and IORD MRD ...
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An example of a PD4701A data read is shown in Fig. 5. Fig. 5 Example of PD4701A Data Read Count value latch X counter low byte read X counter high byte & switch status read Y counter low byte read ...
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APPLICATION AREAS Two-phase incremental signals are used for detection and measurement of a vector quantity (a quantity that has direction and magnitude), and are widely employed in measuring instruments such as micrometers and linear scales, control systems for digital ...
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ABSOLUTE MAXIMUM RATINGS (T a PARAMETER Supply voltage Input voltage Output voltage Operating temperature Storage temperature Permissible loss DC CHARACTERISTICS (T = – PARAMETER Input voltage high Input voltage low Output voltage low Output voltage ...
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AC CHARACTERISTICS (T = – PARAMETER Input cycle High-level pulse width A B Low-level pulse width Signal phase difference time R, L High-level pulse width M Low-level ...
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Fig. 6 Two-Phase Signal & Switch Signal Input Timing t PWABH SAB RIGHT LEFT MIDDLE Fig. 7 Count Flag Output Timing t PWRS RESET SCTEN ...
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CS t SACS X/Y U/L t DCSD Fig. 9 Switch Flag Signal Output Timing RIGHT LEFT MIDDLE SF 12 Fig. 8 Data Output Timing t DAD t t DSFL DSFH PD4701A t HCSA t FCSD ...
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RECOMMENDED SOLDERING CONDITIONS The following conditions (see table below) must be met when soldering this product. Please consult with our sales offices in case other soldering process is used case soldering is done under different conditions. TYPES OF ...
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PLASTIC DIP (600 mil NOTES 1) Each lead centerline is located within 0.25 mm (0.01 inch) of its true position (T.P.) at maximum material condition. 2) Item "K" ...
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PIN PLASTIC SOP (375 mil NOTE Each lead centerline is located within 0.12 mm (0.005 inch) of its true position (T.P.) at maximum material condition. 13 detail of lead end 12 L ...
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No part of this document may be copied or reproduced in any form or by any means without the prior written consent of NEC Corporation. NEC Corporation assumes no responsibility for any errors which may appear in this document. ...