TS87C52X2-LIA Atmel, TS87C52X2-LIA Datasheet - Page 30
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TS87C52X2-LIA
Manufacturer Part Number
TS87C52X2-LIA
Description
IC MCU 8BIT 8K OTP 30MHZ 40-DIP
Manufacturer
Atmel
Series
87Cr
Datasheet
1.TS87C52X2-VCA.pdf
(55 pages)
Specifications of TS87C52X2-LIA
Core Processor
8051
Core Size
8-Bit
Speed
30/20MHz
Connectivity
UART/USART
Peripherals
POR
Number Of I /o
32
Program Memory Size
8KB (8K x 8)
Program Memory Type
OTP
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
Reduced EMI Mode
30
TS8xCx2X2
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.
Table 18. AUXR Register
AUXR - Auxiliary Register (8Eh)
Reset Value = XXXX XXX0b
Not bit addressable
Number
Bit
7
-
7
6
5
4
3
2
1
0
Mnemonic Description
Bit
AO
6
-
-
-
-
-
-
-
-
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.
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.
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.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
ALE Output bit
Clear to restore ALE operation during internal fetches.
Set to disable ALE operation during internal fetches.
5
-
4
-
3
-
2
-
1
-
4184G–8051–09/06
AO
0