Rainbow-electronics T89C51AC2 Uživatelský manuál stáhnout pdf (Strana 28)

T89C51AC2

Rev. B – 19-Dec-01

8.5 Registers Table 6. EECON Register

EECON (S:0D2h)

EEPROM Control Register

Reset Value= XXXX XX00b

Not bit addressable

76543210

EEPL3 EEPL2 EEPL1 EEPL0 - - EEE EEBUSY

Bit Number

Bit

Mnemonic Description

7-4 EEPL3-0

Programming Launch command bits

Write 5Xh followed by AXh to EEPL to launch the programming.

Reserved

The value read from this bit is indeterminate. Do not set this bit.

Reserved

The value read from this bit is indeterminate. Do not set this bit.

1 EEE

Enable EEPROM Space bit

SettomaptheEEPROMspaceduringMOVXinstructions(Writeinthecolumn

latches)

Clear to map the XRAM space during MOVX.

0 EEBUSY

Programming Busy flag

Set by hardware when programming is in progress.

Cleared by hardware when programming is done.

Can not be set or cleared by software.

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 109 110

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Rainbow-electronics T89C51AC2 Uživatelský manuál Strana 28