Rainbow-electronics T89C51CC02 Bedienungsanleitung PDF herunterladen (Seite 34)

34 Rev.A - May 17, 2001

Preliminary

T89C51CC02

9.5. Registers

EECON (S:0D2h)

EEPROM Control Register

Reset Value= XXXX XX00b

Not bit addressable

Figure 18. EECON Register

7 6 5 4 3 2 1 0

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

Set to map the EEPROM space during MOVX instructions (Write in the column latches)

Clear to map the ERAM 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.

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Rainbow-electronics T89C51CC02 Bedienungsanleitung Seite 34