TS80C32X2-ECCR Atmel Corporation, TS80C32X2-ECCR Datasheet - Page 32
TS80C32X2-ECCR
Manufacturer Part Number
TS80C32X2-ECCR
Description
8-bit Microcontroller ROMless
Manufacturer
Atmel Corporation
Datasheet
1.TS80C32X2-ECCR.pdf
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TS80C32X2
TS87C52X2
TS80C52X2
6.10 Reduced EMI Mode
The ALE signal is used to demultiplex address and data buses on port 0 when used with external program or data
memory. Nevertheless, during internal code execution, ALE signal is still generated. In order to reduce EMI, ALE
signal can be disabled by setting AO bit.
The AO bit is located in AUXR register at bit location 0. As soon as AO is set, ALE is no longer output but
remains active during MOVX and MOVC instructions and external fetches. During ALE disabling, ALE pin is
weakly pulled high.
AUXR - Auxiliary Register (8Eh)
Reset Value = XXXX XXX0b
Not bit addressable
32
Number
Bit
7
6
5
4
3
2
1
0
7
-
Mnemonic
Bit
AO
-
-
-
-
-
-
-
6
-
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
ALE Output bit
The value read from this bit is indeterminate. Do not set this bit.
The value read from this bit is indeterminate. Do not set this bit.
The value read from this bit is indeterminate. Do not set this bit.
The value read from this bit is indeterminate. Do not set this bit.
The value read from this bit is indeterminate. Do not set this bit.
The value read from this bit is indeterminate. Do not set this bit.
The value read from this bit is indeterminate. Do not set this bit.
Clear to restore ALE operation during internal fetches.
Set to disable ALE operation during internal fetches.
5
-
Table 17. AUXR Register
4
-
3
-
Description
2
-
Rev.D - 16 November, 2000
1
-
AO
0
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