23 lines
823 B
Plaintext
23 lines
823 B
Plaintext
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Model-specific configuration registers
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Placement of configuration values
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"~" means the bit is a negated boolean. Sometimes values overlap,
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depending on MCU model.
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In STC89 series, there is only a single MCS byte.
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MCS0
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----
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MSB 7 6 5 4 3 2 1 0 LSB
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~WDEN XRAM ALE OSCG ~EERE ~BSLD 0 ~CPU6T
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~WDEN := watchdog enable after power-on-reset
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XRAM := enable access to internal XRAM
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ALE := enable ALE pin function (otherwise, it's just regular GPIO)
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OSCG := high oscillator gain
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~EREE := enable eeprom erase next time MCU is programmed
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~BSLD := enable BSL pin detect; i.e. BSL is only enabled if P1.0/P1.1
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(or others, depends on MCU model) are held low on POR.
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~CPU6T := enable double speed (6T cycles instead of 12T cycles) mode
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