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Z86C34 датащи(PDF) 34 Page - Zilog, Inc. |
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Z86C34 датащи(HTML) 34 Page - Zilog, Inc. |
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34 / 70 page ![]() Z86C34/C35/C36/C44/C45/C46 CMOS Z8® MCUs with ASCI UART ZiLOG 34 P R E L I M I N A R Y DS007601-Z8X0499 FUNCTIONAL DESCRIPTION (Continued) Interrupts. The Z8 features six different interrupts from six different sources. These interrupts are maskable, prioritized (Figure 23) and the six sources are divided as follows: four sources are claimed by Port 3 lines P33–P30, and two in counter/timers (Table 11). The Interrupt Mask Register glo- bally or individually enables or disables the six interrupt re- quests. Figure 22. Counter/Timer Block Diagram PRE0 Initial Value Register T0 Initial Value Register T0 Current Value Register 6-Bit Down Counter 8-bit Down Counter 16 ÷4 6-Bit Down Counter 8-Bit Down Counter PRE1 Initial Value Register T1 Initial Value Register T1 Current Value Register 2 Clock Logic IRQ4 T P36 IRQ5 Internal Data Bus Write Write Read Internal Clock Gated Clock Triggered Clock TIN P31 Write Write Read Internal Data Bus External Clock Internal Clock D0 (SMR) ÷4 ÷2 OSC D1 (SMR) OUT |
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