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ST18952 Arkusz danych(PDF) 5 Page - STMicroelectronics |
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ST18952 Arkusz danych(HTML) 5 Page - STMicroelectronics |
5 / 67 page 5/66 ST18952 2 Pin Description The following tables detail the ST18952 pin set. There is one table for each group of pins. The tables detail the pin name, type and a short description of the pin function. Signal names have an overbar if they are active low, otherwise they are active high. Table 2.1 Direct I bus extension (35 pins) Table 2.2 Direct Y bus extension (35 pins) Table 2.3 Direct X bus extension / bus extension through bus switch unit (39 pins) Pin name Type Description IDE0-15 I/O Instruction data extension bus. IAE0-15 O Instruction address extension bus. IRDE O I-extension bus read strobe. Active low. IWRE O I-extension bus write strobe. Active low. IBSE O I-extension bus strobe. Active low. Pin name Type Description YDE0-15 I/O Y data extension bus. YAE0-15 O Y address extension bus. YRDE O Y-extension bus read strobe. Active low. YWRE O Y-extension bus write strobe. Active low. YBSE O Y-extension bus strobe. Active low. Pin name Type Description ED_XDE0-15 I/O Multiplexed input/output. Bus switch unit extension data bus or X data exten- sion bus. EA_XAE0-15 O Multiplexed output. Bus switch unit extension address bus or X address ex- tension bus. EIRD O BSU EIRD output EIWR O BSU EIWR output XBSE O X extension bus data strobe EYRD O BSU EYRD output EYWR O BSU EYWR output XRDE_EXRD O Multiplexed output. X-extension bus read strobe (XRDE) or BSU EXRD output. XWRE_EXWR O Multiplexed output. X-extension bus write strobe (XWRE) or BSU EXWR output. |
Podobny numer części - ST18952 |
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Podobny opis - ST18952 |
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