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Z8F6421AN020EC Datasheet(PDF) 6 Page - Zilog, Inc.

Part # Z8F6421AN020EC
Description  High Performance 8-Bit Microcontrollers Z8 Encore-R 64K Series
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Manufacturer  ZILOG [Zilog, Inc.]
Direct Link  http://www.zilog.com
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Z8F6421AN020EC Datasheet(HTML) 6 Page - Zilog, Inc.

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PS019915-1005
Table of Contents
Z8 Encore!® 64K Series
Product Specification
vi
Interrupt Control Register Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Interrupt Request 0 Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Interrupt Request 1 Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Interrupt Request 2 Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
IRQ0 Enable High and Low Bit Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
IRQ1 Enable High and Low Bit Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
IRQ2 Enable High and Low Bit Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Interrupt Edge Select Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Interrupt Port Select Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Interrupt Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Timer Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Reading the Timer Count Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Timer Output Signal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Timer Control Register Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Timer 0-3 High and Low Byte Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Timer Reload High and Low Byte Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Timer 0-3 PWM High and Low Byte Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Timer 0-3 Control 0 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Timer 0-3 Control 1 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Watch-Dog Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Watch-Dog Timer Refresh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Watch-Dog Timer Time-Out Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Watch-Dog Timer Reload Unlock Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Watch-Dog Timer Control Register Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Watch-Dog Timer Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Watch-Dog Timer Reload Upper, High and Low Byte Registers . . . . . . . . . . . . . . 95
UART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Transmitting Data using the Polled Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Transmitting Data using the Interrupt-Driven Method . . . . . . . . . . . . . . . . . . . . . . 101
Receiving Data using the Polled Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Receiving Data using the Interrupt-Driven Method . . . . . . . . . . . . . . . . . . . . . . . . 103


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