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Z8F3221AN020EC 데이터시트(PDF) 35 Page - Zilog, Inc. |
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Z8F3221AN020EC 데이터시트(HTML) 35 Page - Zilog, Inc. |
35 / 299 page PS019915-1005 Signal and Pin Descriptions Z8 Encore!® 64K Series Product Specification 15 XOUT O External Crystal Output. This pin is the output of the crystal oscillator. A crystal can be connected between it and the XIN pin to form the oscillator. When the system clock is referred to in this manual, it refers to the frequency of the signal at this pin. This pin must be left unconnected when not using a crystal. RCOUT O RC Oscillator Output. This signal is the output of the RC oscillator. It is multiplexed with a general-purpose I/O pin. This signal must be left unconnected when not using a crystal. On-Chip Debugger DBG I/O Debug. This pin is the control and data input and output to and from the On-Chip Debugger. This pin is open-drain. For operation of the On-Chip Debugger, all power pins (VDD and AVDD) must be supplied with power and all ground pins (VSS and AVSS) must be properly grounded. The DBG pin is open-drain and must have an external pull-up resistor to ensure proper operation. Reset RESET I RESET. Generates a Reset when asserted (driven Low). Power Supply VDD I Power Supply. AVDD I Analog Power Supply. VSS I Ground. AVSS I Analog Ground. Table 3. Signal Descriptions (Continued) Signal Mnemonic I/O Description Caution: |
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