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Rabbit 6000 User’s Manual
digi.com
35
3. R
ESET
AND
B
OOTSTRAP
3.1 Overview
The Rabbit 6000’s /RESET pin initializes everything in the processor except for the real-time clock regis-
ters, the contents of the battery-backed onchip-encryption RAM and the 32K battery-backed SRAM. If a
write cycle is in progress, it waits until the write cycle is completed to avoid potential memory corruption.
After reset, the Rabbit 6000 checks the state of the SMODE and SYSCFG pins. Depending on the state of
the SMODE pins, it either begins normal operation by fetching instruction bytes from memory bank zero,
which is mapped to either /CS0 or /CS3 depending on the state of the SYSCFG pin, or it enters a special
bootstrap mode where it fetches bytes from either Serial Port A or the slave port. In this mode, bytes can
be written to internal registers to set up the Rabbit 6000 for a particular configuration, or to memory to
load a program. The processor can begin normal operation once the bootstrap operation is completed.
Содержание 6000
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Страница 234: ...Rabbit 6000 User s Manual digi com 234 Figure 22 3 Sample Slow A D Converter Circuit...
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Страница 420: ...Rabbit 6000 User s Manual digi com 420 Figure 37 1 Memory Read and Write Cycles...